Preview: Recent Articles in Phys. Rev. C
Recent Articles in Phys. Rev. C
Recent articles in Physical Review C
Published: 2017-05-26T11:32:49-04:00
Triaxiality in the proton emitter ^{109} I
2017-05-25T10:00:00-04:00
Author(s): Swati Modi, M. Patial, P. Arumugam, E. Maglione, and L. S. Ferreira
We study the role of triaxial deformation in the proton-emitting nucleus ^{109}I. We analyze the rotational spectrum as well as the decay width within the nonadiabatic quasiparticle approach. The parent nuclear wave functions are calculated using a modified rotation-particle coupling where the matri…
[Phys. Rev. C 95, 054323] Published Thu May 25, 2017
Coarse-grained short-range correlations
2017-05-24T10:00:00-04:00
Author(s): I. Ruiz Simo, R. Navarro Pérez, J. E. Amaro, and E. Ruiz Arriola
We develop a scheme to take into account the effects of short-range nucleon-nucleon correlations in the nucleon-pair wave function by solving the Bethe-Goldstone equation for a coarse-grained delta shell potential in S-wave configuration. The S-wave delta shell potential has been adjusted to reprodu…
[Phys. Rev. C 95, 054003] Published Wed May 24, 2017
Global analysis of quadrupole shape invariants based on covariant energy density functionals
2017-05-24T10:00:00-04:00
Author(s): S. Quan, Q. Chen, Z. P. Li, T. Nikšić, and D. Vretenar
Background: The coexistence of different geometric shapes at low energies presents a universal structure phenomenon that occurs over the entire chart of nuclides. Studies of the shape coexistence are important for understanding the microscopic origin of collectivity and modifications of shell struct…
[Phys. Rev. C 95, 054321] Published Wed May 24, 2017
Abrupt shape transition at neutron number N=60: B(E2) values in ^{94,96,98} Sr from fast γ−γ timing
2017-05-23T10:00:00-04:00
Author(s): J.-M. Régis
et al.Lifetimes of low-lying yrast states in neutron-rich ^{94,96,98}Sr have been measured by Germanium-gated γ−γ fast timing with LaBr3(Ce) detectors using the EXILL spectrometer at the Institut Laue-Langevin. Sr fission products were generated using cold-neutron-induced fission of ^{235}U and stopped al…
[Phys. Rev. C 95, 054319] Published Tue May 23, 2017
Pygmy Gamow-Teller resonance in the N=50 region: New evidence from staggering of β-delayed neutron-emission probabilities
2017-05-23T10:00:00-04:00
Author(s): D. Verney, D. Testov, F. Ibrahim, Yu. Penionzhkevich, B. Roussière, V. Smirnov, F. Didierjean, K. Flanagan, S. Franchoo, E. Kuznetsova, R. Li, B. Marsh, I. Matea, H. Pai, E. Sokol, I. Stefan, and D. Suzuki
We report on the β-delayed neutron emission probability (P_{1n}) measurements of the ^{82,83,84}Ga (N=51,52,53) precursors performed in one single experiment using the ^{3}He neutron-counter TETRA at the ALTO facility in Orsay. Altogether our results for the three A=82,83, and 84 Ga precursors point…
[Phys. Rev. C 95, 054320] Published Tue May 23, 2017
Warm unstable asymmetric nuclear matter: Critical properties and the density dependence of the symmetry energy
2017-05-23T10:00:00-04:00
Author(s): N. Alam, H. Pais, C. Providência, and B. K. Agrawal
The spinodal instabilities in hot asymmetric nuclear matter and some important critical parameters derived thereof are studied by using six different families of relativistic mean-field models. The slopes of the symmetry energy coefficient vary over a wide range within each family. The critical dens…
[Phys. Rev. C 95, 055808] Published Tue May 23, 2017
Width of NΔ and ΔΔ states
2017-05-22T10:00:00-04:00
Author(s): J. A. Niskanen
It is seen by a coupled-channel NN scattering calculation that in the intermediate two-baryon NΔ or ΔΔ system the width of the state is greatly diminished due to the relative kinetic energy of the two baryons, since the internal energy of the particles, available for pionic decay, is smaller. Specif…
[Phys. Rev. C 95, 054002] Published Mon May 22, 2017
Applying the density matrix expansion with coordinate-space chiral interactions
2017-05-22T10:00:00-04:00
Author(s): A. Dyhdalo, S. K. Bogner, and R. J. Furnstahl
We apply the density matrix expansion (DME) at Hartree-Fock level with long-range chiral effective field theory interactions defined in coordinate space up to next-to-next-to-leading order. We consider chiral potentials both with and without explicit Δ isobars. The challenging algebra associated wit…
[Phys. Rev. C 95, 054314] Published Mon May 22, 2017
Toroidal high-spin isomers in the nucleus ^{304} 120
2017-05-22T10:00:00-04:00
Author(s): A. Staszczak, Cheuk-Yin Wong, and A. Kosior
Background: Strongly deformed oblate superheavy nuclei form an intriguing region where the toroidal nuclear structures may bifurcate from the oblate spheroidal shape. The bifurcation may be facilitated when the nucleus is endowed with a large angular moment about the symmetry axis with I=I_{z}. The …
[Phys. Rev. C 95, 054315] Published Mon May 22, 2017
Search for weak M1 transitions in ^{48} Ca with inelastic proton scattering
2017-05-22T10:00:00-04:00
Author(s): M. Mathy, J. Birkhan, H. Matsubara, P. von Neumann-Cosel, N. Pietralla, V. Yu. Ponomarev, A. Richter, and A. Tamii
Background: The quenching of spin-isospin modes in nuclei is an important field of research in nuclear structure. It has an impact on astrophysical reaction rates and on fundamental processes like neutrinoless double-β decay. Gamow–Teller (GT) and spin-flip M1 strengths are quenched. Concerning the …
[Phys. Rev. C 95, 054316] Published Mon May 22, 2017
E1 and M1 strength functions from average resonance capture data
2017-05-22T10:00:00-04:00
Author(s): J. Kopecky, S. Goriely, S. Péru, S. Hilaire, and M. Martini
The average resonance capture (ARC) data measured at different filter beam facilities are re-analyzed. They include all measurements made between 1970 and 1990, but only partially exploited. Updated spectroscopic information on the states of interest as well as on s-wave resonance spacing are used t…
[Phys. Rev. C 95, 054317] Published Mon May 22, 2017
Green's function relativistic mean field theory for Λ hypernuclei
2017-05-22T10:00:00-04:00
Author(s): S.-H. Ren (任素红), T.-T. Sun (孙亭亭), and W. Zhang (张炜)
The relativistic mean field theory with the Green's function method is extended to study Λ hypernuclei. Taking the hypernucleus _{Λ}^{61}Ca as an example, the single-particle resonant states for Λ hyperons are investigated by analyzing the density of states, and the corresponding energies and widths…
[Phys. Rev. C 95, 054318] Published Mon May 22, 2017
Separable representation of multichannel nucleon-nucleus optical potentials
2017-05-22T10:00:00-04:00
Author(s): L. Hlophe and Ch. Elster
Background: One important ingredient for many applications of nuclear physics to astrophysics, nuclear energy, and stockpile stewardship is cross sections for reactions of neutrons with rare isotopes. Since direct measurements are often not feasible, indirect methods, e.g., (d,p) reactions, should b…
[Phys. Rev. C 95, 054617] Published Mon May 22, 2017
Effect of an electromagnetic field on the spectra and elliptic flow of particles
2017-05-22T10:00:00-04:00
Author(s): Bohao Feng and Zeyan Wang
In 2+1 dimensions, the evolution of flow under the influence of an external electromagnetic field is simulated. The external electromagnetic field is exponentially decaying with time. Under the same initial conditions, flow evolution with and without the external electromagnetic field is compared. I…
[Phys. Rev. C 95, 054912] Published Mon May 22, 2017
Reexamination of fission in the A≈200 mass region with excitation energy near 50 MeV
2017-05-19T10:00:00-04:00
Author(s): K. Mahata and S. Kailas
Even though the fission of nuclei in the mass region 200 with excitation energy near 50 MeV has been studied extensively, a unique description of the fission probability and prefission neutron multiplicity (ν_{pre}) data remains elusive. In the present work, a reexamination of the relevant data alon…
[Phys. Rev. C 95, 054616] Published Fri May 19, 2017
Low-lying level structure of ^{56} Cu and its implications for the rp process
2017-05-19T10:00:00-04:00
Author(s): W.-J. Ong
et al.The low-lying energy levels of proton-rich ^{56}Cu have been extracted using in-beam γ-ray spectroscopy with the state-of-the-art γ-ray tracking array GRETINA in conjunction with the S800 spectrograph at the National Superconducting Cyclotron Laboratory at Michigan State University. Excited states i…
[Phys. Rev. C 95, 055806] Published Fri May 19, 2017
Nuclear pasta phases within the quark-meson coupling model
2017-05-19T10:00:00-04:00
Author(s): Guilherme Grams, Alexandre M. Santos, Prafulla K. Panda, Constança Providência, and Débora P. Menezes
In this work, the low-density regions of nuclear and neutron star matter are studied. The search for the existence of nuclear pasta phases in this region is performed within the context of the quark-meson coupling (QMC) model, which incorporates quark degrees of freedom. Fixed proton fractions are c…
[Phys. Rev. C 95, 055807] Published Fri May 19, 2017
Breakup of ^{6} Li+p at near-barrier energies and the effect on elastic scattering
2017-05-18T10:00:00-04:00
Author(s): V. Soukeras
et al.Exclusive breakup measurements have been performed for the ^{6}Li+p system in inverse kinematics at ^{6}Li incident energies of 25 and 29 MeV. The results are considered in the Continuum Discretized Coupled-Channels framework, together with elastic scattering data at 16, 20, 25, and 29 MeV, obtained…
[Phys. Rev. C 95, 054614] Published Thu May 18, 2017
Investigation of giant dipole resonances in heavy deformed nuclei with an extended quantum molecular dynamics model
2017-05-18T10:00:00-04:00
Author(s): S. S. Wang (王闪闪), Y. G. Ma (马余刚), X. G. Cao (曹喜光), W. B. He (何万兵), H. Y. Kong (孔海云), and C. W. Ma (马春旺)
The deformation evolution of giant dipole resonance (GDR), in the chains of Sm and Nd isotopes, are investigated in the framework of an extended quantum molecular dynamics (EQMD) model. The mass number dependence of resonance peak position (E_{m}) in the major and minor axis directions of deformed n…
[Phys. Rev. C 95, 054615] Published Thu May 18, 2017
Anisotropic fluid dynamics for Gubser flow
2017-05-18T10:00:00-04:00
Author(s): M. Martinez, M. McNelis, and U. Heinz
Exploring a variety of closing schemes to the infinite hierarchy of momentum moments of the exactly solvable Boltzmann equation for systems undergoing Gubser flow, we study the precision with which the resulting hydrodynamic equations reproduce the exact evolution of hydrodynamic moments of the dist…
[Phys. Rev. C 95, 054907] Published Thu May 18, 2017
Differential flow correlations in relativistic heavy-ion collisions
2017-05-18T10:00:00-04:00
Author(s): Jing Qian, Ulrich Heinz, Ronghua He, and Lei Huo
A systematic analysis of correlations between different orders of p_{T}-differential flow is presented, including mode coupling effects in flow vectors, correlations between flow angles (a.k.a. event-plane correlations), and correlations between flow magnitudes, all of which were previously studied …
[Phys. Rev. C 95, 054908] Published Thu May 18, 2017
Effect of bulk viscosity on interferometry correlations in ultrarelativistic heavy-ion collisions
2017-05-18T10:00:00-04:00
Author(s): Piotr Bożek
A temperature-dependent bulk viscosity coefficient is used in 3+1-dimensional hydrodynamic simulations. I study the effect of the increase of bulk viscosity around the critical temperature on the system dynamics in central Pb+Pb collisions at sqrt[s_{NN}]=2760 GeV. With increasing bulk viscosity the…
[Phys. Rev. C 95, 054909] Published Thu May 18, 2017
Relative flow fluctuations as a probe of initial state fluctuations
2017-05-18T10:00:00-04:00
Author(s): Giuliano Giacalone, Jacquelyn Noronha-Hostler, and Jean-Yves Ollitrault
Elliptic flow, v_{2}, and triangular flow, v_{3}, are to a good approximation linearly proportional to the corresponding spatial anisotropies of the initial density profile, ɛ_{2} and ɛ_{3}. Using event-by-event hydrodynamic simulations, we point out when deviations from this linear scaling are to b…
[Phys. Rev. C 95, 054910] Published Thu May 18, 2017
Shape coexistence and mixing in ^{96} Zr
2017-05-17T10:00:00-04:00
Author(s): H. T. Fortune
I have performed a reanalysis of mixing between the first two 0^{+} and 2^{+} states in ^{96}Zr. My mixing amplitude for the 0^{+} states is about three times a recent value, although both are small. My mixing is consistent with the E0 strength connecting the two 0^{+} states, whereas the earlier mi…
[Phys. Rev. C 95, 054313] Published Wed May 17, 2017
Influence of complex configurations on the properties of the pygmy dipole resonance in neutron-rich Ca isotopes
2017-05-16T10:00:00-04:00
Author(s): N. N. Arsenyev, A. P. Severyukhin, V. V. Voronov, and Nguyen Van Giai
Starting from the quasiparticle random phase approximation based on the Skyrme interaction SLy5, we study the effects of phonon-phonon coupling (PPC) on the low-energy electric dipole response in ^{40−58}Ca. Using the same set of parameters we describe available experimental data for ^{40,44,48}Ca a…
[Phys. Rev. C 95, 054312] Published Tue May 16, 2017
Bulk and isospin instabilities in hot nuclear matter
2017-05-16T10:00:00-04:00
Author(s): V. M. Kolomietz and S. Shlomo
The instability of hot asymmetric nuclear matter with respect to bulk density distortions is considered. The equation of state of the extended Thomas-Fermi approximation is used. The origin of the anomalous dispersion and the influence of the Fermi-surface distortion effects on the bulk and isospin …
[Phys. Rev. C 95, 054613] Published Tue May 16, 2017
Quark mean field model with pion and gluon corrections for Λ and Ξ^{0} hypernuclei and neutron stars
2017-05-15T10:00:00-04:00
Author(s): Xueyong Xing, Jinniu Hu, and Hong Shen
Properties of Λ and Ξ^{0} hypernuclei and neutron stars are investigated in a quark mean field model with pion and gluon corrections. First, u, d, and s quarks are confined by relativistic harmonic oscillator potentials to generate baryons, such as nucleons and Λ, Σ, and Ξ hyperons. The effects of p…
[Phys. Rev. C 95, 054310] Published Mon May 15, 2017
Seagull and pion-in-flight currents in neutrino-induced 1N and 2N knockout
2017-05-15T10:00:00-04:00
Author(s): T. Van Cuyck, N. Jachowicz, R. González-Jiménez, J. Ryckebusch, and N. Van Dessel
Background: The neutrino-nucleus (νA) cross section is a major source of systematic uncertainty in neutrino-oscillation studies. A precise νA scattering model, in which multinucleon effects are incorporated, is pivotal for an accurate interpretation of the data.
[Phys. Rev. C 95, 054611] Published Mon May 15, 2017
Production cross sections of neutron-rich ^{261−263} No isotopes
2017-05-15T10:00:00-04:00
Author(s): Jingjing Li, Cheng Li, Gen Zhang, Long Zhu, Zhong Liu, and Feng-Shou Zhang
The fusion excitation functions of ^{249−263}No are studied by using various reaction systems based on the dinuclear system model. The neutron-rich radioactive beam ^{22}O is used to produce neutron-rich nobelium isotopes, and the new neutron-rich isotopes ^{261−263}No are synthesized by ^{242}Pu(^{…
[Phys. Rev. C 95, 054612] Published Mon May 15, 2017
Decay angular distributions of K^{*} and D^{*} vector mesons in pion-nucleon scattering
2017-05-15T10:00:00-04:00
Author(s): Sang-Ho Kim, Yongseok Oh, and Alexander I. Titov
The production mechanisms of open strangeness (K^{*}) and open charm (D^{*}) vector mesons in π^{−}p scattering, namely, π^{−}+p→K^{*0}+Λ and π^{−}+p→D^{*−}+Λ_{c}^{+}, are investigated within the modified quark-gluon string model. To identify the major reaction mechanisms, we consider the subsequent…
[Phys. Rev. C 95, 055206] Published Mon May 15, 2017
New measurement of the ^{8} Li(α,n) ^{11} B reaction in a lower-energy region below the Coulomb barrier
2017-05-15T10:00:00-04:00
Author(s): S. K. Das, T. Fukuda, Y. Mizoi, H. Ishiyama, H. Miyatake, Y. X. Watanabe, Y. Hirayama, S. C. Jeong, H. Ikezoe, M. Matsuda, K. Nishio, and T. Hashimoto
The ^{8}Li(α,n)^{11}B reaction is regarded as the key reaction in the inhomogeneous big bang and in type-II supernova nucleosynthesis. Recently, the importance of this reaction to solving the ^{7}Li problem, i.e., the inconsistency between the predicted and the observed primordial ^{7}Li abundances,…
[Phys. Rev. C 95, 055805] Published Mon May 15, 2017
Geometric shapes and relationships of some one-body and multibody leptodermous distributions
2017-05-12T10:00:00-04:00
Author(s): G. Royer, N. Mokus, and J. Jahan
Different families of geometric shapes, derived mainly from lemniscatoids, are proposed to describe ground and excited states of leptodermous distributions of nuclear matter. The transition from one spherical or ellipsoidal nucleus to several spherical or ellipsoidal nuclei or vice versa (in the dec…
[Phys. Rev. C 95, 054610] Published Fri May 12, 2017
Cumulants and correlation functions versus the QCD phase diagram
2017-05-12T10:00:00-04:00
Author(s): Adam Bzdak, Volker Koch, and Nils Strodthoff
In this paper we discuss the relation of particle number cumulants and correlation functions. It is argued that measuring couplings of the genuine multiparticle correlation functions could provide cleaner information on possible nontrivial dynamics in heavy-ion collisions. We extract integrated mult…
[Phys. Rev. C 95, 054906] Published Fri May 12, 2017
Challenges in flow background removal in search for the chiral magnetic effect
2017-05-11T10:00:00-04:00
Author(s): Fuqiang Wang and Jie Zhao
We investigate the effect of resonance decays on the three-particle correlator charge separation observable in a search for the chiral magnetic effect, using a simple simulation with realistic inputs. We find that resonance decays can largely account for the measured signal. We suppress the elliptic…
[Phys. Rev. C 95, 051901(R)] Published Thu May 11, 2017
Three-quasiparticle isomer in ^{173} Ta and the excitation energy dependence of K-forbidden transition rates
2017-05-11T10:00:00-04:00
Author(s): R. T. Wood, P. M. Walker, G. J. Lane, R. J. Carroll, D. M. Cullen, G. D. Dracoulis, S. S. Hota, T. Kibédi, N. Palalani, Zs. Podolyák, M. W. Reed, K. Schiffl, and A. M. Wright
Using the ^{168}Er(^{10}B,5n) reaction at a beam energy of 68 MeV, new data have been obtained for the population and decay of a T_{1/2}=148 ns, K^{π}=21/2^{−} three-quasiparticle isomer at 1717 keV in ^{173}Ta. Revised decay energies and intensities have been determined, together with newly observe…
[Phys. Rev. C 95, 054308] Published Thu May 11, 2017
Elastic scattering of ^{7} Be+ ^{28} Si at near-barrier energies
2017-05-11T10:00:00-04:00
Author(s): O. Sgouros
et al.The elastic scattering of the radioactive nucleus ^{7}Be from a ^{28}Si target was studied at four near-barrier energies: 13.2, 17.2, 19.8, and 22.0 MeV (E/V_{C}=1.14, 1.48, 1.71, and 1.90). Angular distribution measurements were performed at each energy with the multidetector array EXPADES in conju…
[Phys. Rev. C 95, 054609] Published Thu May 11, 2017
Conserved charge fluctuations using the D measure in heavy-ion collisions
2017-05-11T10:00:00-04:00
Author(s): D. K. Mishra, P. K. Netrakanti, and P. Garg
We study the net-charge fluctuation D-measure variable, in high-energy heavy-ion collisions in heavy-ion jet interaction generator (HIJING), ultrarelativistic quantum molecular dynamics (UrQMD), and hadron resonance gas (HRG) models for various center-of-mass energies (sqrt[s_{_{NN}}]). The effects …
[Phys. Rev. C 95, 054905] Published Thu May 11, 2017
Quantum nuclear pasta and nuclear symmetry energy
2017-05-11T10:00:00-04:00
Author(s): F. J. Fattoyev, C. J. Horowitz, and B. Schuetrumpf
Complex and exotic nuclear geometries, collectively referred to as “nuclear pasta,” are expected to appear naturally in dense nuclear matter found in the crusts of neutron stars and supernovae environments. The pasta geometries depend on the average baryon density, proton fraction, and temperature a…
[Phys. Rev. C 95, 055804] Published Thu May 11, 2017
Power counting in peripheral partial waves: The singlet channels
2017-05-10T10:00:00-04:00
Author(s): M. Pavón Valderrama, M. Sánchez Sánchez, C.-J. Yang, Bingwei Long, J. Carbonell, and U. van Kolck
We analyze the power counting of the peripheral singlet partial waves in nucleon-nucleon scattering. In agreement with conventional wisdom, we find that pion exchanges are perturbative in the peripheral singlets. We quantify from the effective field theory perspective the well-known suppression indu…
[Phys. Rev. C 95, 054001] Published Wed May 10, 2017
Applicability of the Richardson method in a complex-energy basis: Fermionic case
2017-05-10T10:00:00-04:00
Author(s): O. Civitarese, M. Reboiro, and D. Tielas
We are testing the applicability of the algebraic procedure developed by Richardson for bound states to solve the pairing-force problem in presence of states with complex energies. This scenario, in which nucleons occupy single-particle states with complex energies and interact via the pairing force…
[Phys. Rev. C 95, 054307] Published Wed May 10, 2017
Reliability of (γ,1n), (γ,2n), and (γ,3n) cross-section data on ^{159} Tb
2017-05-10T10:00:00-04:00
Author(s): V. Varlamov, B. Ishkhanov, and V. Orlin
The majority of partial and total photoneutron cross-section data were obtained using beams of quasimonoenergetic photons produced by annihilation in the flight of fast positrons and the method of neutron multiplicity-sorting procedures at Lawrence Livermore National Laboratory (California) and Sacl…
[Phys. Rev. C 95, 054607] Published Wed May 10, 2017
Fission dynamics of ^{252} Cf
2017-05-10T10:00:00-04:00
Author(s): A. Zdeb, A. Dobrowolski, and M. Warda
The time-dependent generator coordinate method with the gaussian overlap approximation (TDGCM+GOA) formalism is applied to describe the fission of ^{252}Cf. We perform analysis of fission from the initial states laying in the energetic range from the ground state to the state located 4 MeV above the…
[Phys. Rev. C 95, 054608] Published Wed May 10, 2017
Quark model study of the πN→πN reactions up to the N(1440) resonance region
2017-05-10T10:00:00-04:00
Author(s): Kai-Lei Wang, Li-Ye Xiao, and Xian-Hui Zhong
A combined analysis of the reactions π^{+}p→π^{+}p, π^{−}p→π^{−}p, and π^{−}p→π^{0}n is carried out with a chiral quark model. The observations are reasonably described from the Δ(1232) resonance region up to the N(1440) resonance region. Besides the Δ(1232)P_{33}, a confirmed role of N(1440)P_{11} …
[Phys. Rev. C 95, 055204] Published Wed May 10, 2017
Indirect study of the stellar ^{34} Ar(α,p) ^{37} K reaction rate through ^{40} Ca(p,t) ^{38} Ca reaction measurements
2017-05-10T10:00:00-04:00
Author(s): A. M. Long, T. Adachi, M. Beard, G. P. A. Berg, Z. Buthelezi, J. Carter, M. Couder, R. J. deBoer, R. W. Fearick, S. V. Förtsch, J. Görres, J. P. Mira, S. H. T. Murray, R. Neveling, P. Papka, F. D. Smit, E. Sideras-Haddad, J. A. Swartz, R. Talwar, I. T. Usman, M. Wiescher, J. J. Van Zyl, and A. Volya
The ^{34}Ar(α,p)^{37}K reaction is believed to be one of the last in a sequence of (α,p) and (p,γ) reactions within the T_{z}=−1, sd-shell nuclei, known as the αp-process. This process is expected to influence the shape and rise times of luminosity curves coming from type I x-ray bursts (XRBs). With…
[Phys. Rev. C 95, 055803] Published Wed May 10, 2017
Spinodal instabilities of baryon-rich quark matter in heavy ion collisions
2017-05-09T10:00:00-04:00
Author(s): Feng Li and Che Ming Ko
Using the test-particle method to solve the transport equation derived from the Nambu-Jona-Lasino (NJL) model, we study how phase separation occurs in expanding quark matter like that in a heavy ion collision. To test our method, we first investigate the growth rates of unstable modes of quark matte…
[Phys. Rev. C 95, 055203] Published Tue May 09, 2017
Novel evolution of the positive parity shears band in ^{106} Ag
2017-05-08T10:00:00-04:00
Author(s): B. Das, N. Rather, P. Datta, S. Chattopadhyay, S. Rajbanshi, A. Goswami, S. Roy, S. Pal, R. Palit, S. Saha, J. Sethi, S. Biswas, P. Singh, and H. C. Jain
The positive-parity band of ^{106}Ag has been extended up to I=25ℏ and the lifetimes of the high spin levels of this band have been measured. The deduced transition rates decrease with increasing spin until I=21ℏ. Beyond this spin, the observed transition rates are substantially small and remain nea…
[Phys. Rev. C 95, 051301(R)] Published Mon May 08, 2017
Identification of excited states and collectivity in ^{88} Se
2017-05-08T10:00:00-04:00
Author(s): I. N. Gratchev, G. S. Simpson, G. Thiamova, M. Ramdhane, K. Sieja, A. Blanc, M. Jentschel, U. Köster, P. Mutti, T. Soldner, G. de France, C. A. Ur, and W. Urban
The γ decays of excited states in the very neutron-rich nucleus ^{88}Se have been observed following the neutron-induced fission of ^{235}U. The measurement was performed using the EXILL array of Ge detectors at the PF1B cold-neutron beam facility of the Institut Laue-Langevin, Grenoble. The level s…
[Phys. Rev. C 95, 051302(R)] Published Mon May 08, 2017
“Sloppy” nuclear energy density functionals. II. Finite nuclei
2017-05-08T10:00:00-04:00
Author(s): T. Nikšić, M. Imbrišak, and D. Vretenar
A study of parameter sensitivity of nuclear energy density functionals, initiated in the first part of this work [Nikšić and Vretenar, Phys. Rev. C 94, 024333 (2016)], is extended by the inclusion of data on ground-state properties of finite nuclei in the application of the manifold boundary approxi…
[Phys. Rev. C 95, 054304] Published Mon May 08, 2017
Equation of state and radii of finite nuclei in the presence of a diffuse surface layer
2017-05-08T10:00:00-04:00
Author(s): V. M. Kolomietz, S. V. Lukyanov, A. I. Sanzhur, and S. Shlomo
The definitions of nuclear surface and nuclear radii are considered within the Gibbs-Tolman-Rowlinson-Widom (GTW) approach. We demonstrate the nonmonotonic behavior of the nuclear equimolar radii, which is due to the shell effects in the chemical potential of finite nuclei. The direct variational me…
[Phys. Rev. C 95, 054305] Published Mon May 08, 2017
Global phenomenological optical model potential for ^{8} Li projectile
2017-05-08T10:00:00-04:00
Author(s): XinWu Su, YinLu Han, HaiYing Liang, ZhenDong Wu, HaiRui Guo, and ChongHai Cai
A set of global phenomenological optical model potential parameters for ^{8}Li projectile is obtained by fitting the experimental data of ^{8}Li elastic-scattering angular distributions from ^{9}Be to ^{208}Pb targets with incident energies between 11.0 and 33.1 MeV. By using the global optical mode…
[Phys. Rev. C 95, 054606] Published Mon May 08, 2017
Nonequilibrium photon production in partonic transport simulations
2017-05-08T10:00:00-04:00
Author(s): Moritz Greif, Florian Senzel, Heiner Kremer, Kai Zhou, Carsten Greiner, and Zhe Xu
We discuss the implementation of leading-order photon production in nonequilibrium partonic transport simulations. In this framework photons are produced by microscopic scatterings, where we include the exact matrix elements of Compton scattering, quark-antiquark annihilation, and bremsstrahlung pro…
[Phys. Rev. C 95, 054903] Published Mon May 08, 2017
Search for a hidden strange baryon-meson bound state from ϕ production in a nuclear medium
2017-05-08T10:00:00-04:00
Author(s): Haiyan Gao, Hongxia Huang, Tianbo Liu, Jialun Ping, Fan Wang, and Zhiwen Zhao
We investigate the hidden strange light baryon-meson system. With the resonating-group method, two bound states, η^{′}−N and ϕ−N, are found in the quark delocalization color screening model. Focusing on the ϕ−N bound state around 1950 MeV, we obtain the total decay width of about 4 MeV by calculatin…
[Phys. Rev. C 95, 055202] Published Mon May 08, 2017
Enforcing causality in nonrelativistic equations of state at finite temperature
2017-05-08T10:00:00-04:00
Author(s): Constantinos Constantinou and Madappa Prakash
We present a thermodynamically consistent method by which equations of state based on nonrelativistic potential models can be modified so that they respect causality at high densities, both at zero and finite temperature (entropy). We illustrate the application of the method by using the high-densit…
[Phys. Rev. C 95, 055802] Published Mon May 08, 2017
Reexamining the nuclear structure of ^{154} Gd in the dynamic pairing plus quadrupole model
2017-05-05T10:00:00-04:00
Author(s): J. B. Gupta and J. H. Hamilton
In a previous study of the collective multiphonon bands in ^{154}Gd, using the microscopic dynamic pairing plus quadrupole model, data for eight K bands were analyzed. In the last four decades, its decay scheme is significantly revised and the nuclear theory has undergone a significant change. Speci…
[Phys. Rev. C 95, 054303] Published Fri May 05, 2017
Global hyperon polarization at local thermodynamic equilibrium with vorticity, magnetic field, and feed-down
2017-05-05T10:00:00-04:00
Author(s): Francesco Becattini, Iurii Karpenko, Michael Annan Lisa, Isaac Upsal, and Sergei A. Voloshin
The system created in ultrarelativistic nuclear collisions is known to behave as an almost ideal liquid. In noncentral collisions, because of the large orbital momentum, such a system might be the fluid with the highest vorticity ever created under laboratory conditions. Particles emerging from such…
[Phys. Rev. C 95, 054902] Published Fri May 05, 2017
Experiment to demonstrate separation of Cherenkov and scintillation signals
2017-05-05T10:00:00-04:00
Author(s): J. Caravaca, F. B. Descamps, B. J. Land, J. Wallig, M. Yeh, and G. D. Orebi Gann
The ability to separately identify the Cherenkov and scintillation light components produced in scintillating mediums holds the potential for a major breakthrough in neutrino detection technology, allowing development of a large, low-threshold, directional detector with a broad physics program. The …
[Phys. Rev. C 95, 055801] Published Fri May 05, 2017
Triaxiality softness and shape coexistence in Mo and Ru isotopes
2017-05-04T10:00:00-04:00
Author(s): H. Abusara, Shakeb Ahmad, and S. Othman
A systematic search of triaxial ground state and shape coexistence in Ru and Mo isotopes is done using the relativistic-Hartree-Bogoliubov formalism using density-dependent zero and finite range NN interactions, and with separable pairing. Shape coexistence and triaxiality softness manifest themselv…
[Phys. Rev. C 95, 054302] Published Thu May 04, 2017
Total and isomeric-state cross sections for the ^{76} Ge(n,2n) ^{75} Ge reaction from threshold to 14.8 MeV
2017-05-04T10:00:00-04:00
Author(s): Megha Bhike, Krishichayan, and W. Tornow
The cross sections for the reaction ^{76}Ge(n,2n)^{75}Ge to both the isomeric state and the ground state of ^{75}Ge have been measured with the activation method between 10 and 15 MeV in small energy steps to help resolve inconsistencies in the existing database. The ^{197}Au(n,2n)^{196}Au reaction …
[Phys. Rev. C 95, 054605] Published Thu May 04, 2017
Isospin mixing from β-delayed proton emission
2017-05-03T10:00:00-04:00
Author(s): N. A. Smirnova, B. Blank, B. A. Brown, W. A. Richter, N. Benouaret, and Y. H. Lam
We present a general scheme of a shell-model analysis of a β-delayed proton emission. We show that the experimental proton to γ-ray branching ratio for the isobaric analog state (IAS) populated in β decay of a precursor, supplemented by theoretical proton and γ-ray widths, can be used to extract spe…
[Phys. Rev. C 95, 054301] Published Wed May 03, 2017
Quantum tunneling with friction
2017-05-03T10:00:00-04:00
Author(s): M. Tokieda and K. Hagino
Using the phenomenological quantum friction models introduced by P. Caldirola [Nuovo Cimento 18, 393 (1941)] and E. Kanai [Prog. Theor. Phys. 3, 440 (1948)], M. D. Kostin [J. Chem. Phys. 57, 3589 (1972)], and K. Albrecht [Phys. Lett. B 56, 127 (1975)], we study quantum tunneling of a one-dimensional…
[Phys. Rev. C 95, 054604] Published Wed May 03, 2017
Investigation of heavy-ion fusion with deformed surface diffuseness: Actinide and lanthanide targets
2017-05-02T10:00:00-04:00
Author(s): S. A. Alavi and V. Dehghani
By using a deformed Broglia-Winther nuclear interaction potential in the framework of the WKB method, the near- and above-barrier heavy-ion-fusion cross sections of ^{16}O with some lanthanides and actinides have been calculated. The effect of deformed surface diffuseness on the nuclear interaction …
[Phys. Rev. C 95, 054602] Published Tue May 02, 2017
Solar neutrino interactions with the double-β decay nuclei ^{82} Se, ^{100} Mo, and ^{150} Nd
2017-05-02T10:00:00-04:00
Author(s): H. Ejiri and S. R. Elliott
Solar neutrinos interact within double-beta decay (ββ) detectors and contribute to backgrounds for ββ experiments. Background contributions due to solar neutrino interactions with ββ nuclei of ^{82}Se, ^{100}Mo, and ^{150}Nd are evaluated. They are shown to be significant for future high-sensitivity…
[Phys. Rev. C 95, 055501] Published Tue May 02, 2017
Interaction cross sections and matter radii of oxygen isotopes using the Glauber model
2017-05-01T10:00:00-04:00
Author(s): Suhel Ahmad, A. A. Usmani, Shakeb Ahmad, and Z. A. Khan
Using the Coulomb modified correlation expansion for the Glauber model S matrix, we calculate the interaction cross sections of oxygen isotopes (^{16–26}O) on ^{12}C at 1.0 GeV/nucleon. The densities of ^{16–26}O are obtained using (i) the Slater determinants consisting of the harmonic oscillator si…
[Phys. Rev. C 95, 054601] Published Mon May 01, 2017
Relating measurable correlations in heavy ion collisions to bulk properties of equilibrated QCD matter
2017-05-01T10:00:00-04:00
Author(s): Scott Pratt and Clint Young
To compare theoretical calculations of thermal fluctuations of conserved quantities, such as charge susceptibilities or specific heat, to experimentally measured correlations and fluctuations in heavy ion collisions, one must confront the reality of changing conditions within the collision environme…
[Phys. Rev. C 95, 054901] Published Mon May 01, 2017
Onset of deformation in neutron-deficient Bi isotopes studied by laser spectroscopy
2017-04-28T10:00:00-04:00
Author(s): A. E. Barzakh, D. V. Fedorov, V. S. Ivanov, P. L. Molkanov, F. V. Moroz, S. Yu. Orlov, V. N. Panteleev, M. D. Seliverstov, and Yu. M. Volkov
In-source laser spectroscopy experiments for bismuth isotopes at the 306.77-nm atomic transition has been carried out at the Investigation of Radioactive Isotopes on Synchrocyclotron facility of Petersburg Nuclear Physics Institute. New data on isotope shifts and hyperfine structure for Bi ground st…
[Phys. Rev. C 95, 044324] Published Fri Apr 28, 2017
Proton-decaying states in light nuclei and the first observation of ^{17} Na
2017-04-28T10:00:00-04:00
Author(s): K. W. Brown, R. J. Charity, J. M. Elson, W. Reviol, L. G. Sobotka, W. W. Buhro, Z. Chajecki, W. G. Lynch, J. Manfredi, R. Shane, R. H. Showalter, M. B. Tsang, D. Weisshaar, J. R. Winkelbauer, S. Bedoor, and A. H. Wuosmaa
An upper limit to the mass of the three-proton unbound nucleus ^{17}Na was measured to be ΔM≤34.72(6) MeV. The excitation energies, widths, and decay modes for one- and two-proton decaying states of ^{8}B, ^{9}B, ^{9}C, ^{16}F, and ^{17}Ne were also measured. The energy-angular decay correlations in…
[Phys. Rev. C 95, 044326] Published Fri Apr 28, 2017
Comparison of ultracold neutron sources for fundamental physics measurements
2017-04-28T10:00:00-04:00
Author(s): G. Bison, M. Daum, K. Kirch, B. Lauss, D. Ries, P. Schmidt-Wellenburg, G. Zsigmond, T. Brenner, P. Geltenbort, T. Jenke, O. Zimmer, M. Beck, W. Heil, J. Kahlenberg, J. Karch, K. Ross, K. Eberhardt, C. Geppert, S. Karpuk, T. Reich, C. Siemensen, Y. Sobolev, and N. Trautmann
Ultracold neutrons (UCNs) are key for precision studies of fundamental parameters of the neutron and in searches for new charge-parity-violating processes or exotic interactions beyond the Standard Model of particle physics. The most prominent example is the search for a permanent electric-dipole mo…
[Phys. Rev. C 95, 045503] Published Fri Apr 28, 2017
First spin-parity constraint of the 306 keV resonance in ^{35} Cl for nova nucleosynthesis
2017-04-28T10:00:00-04:00
Author(s): K. A. Chipps, S. D. Pain, R. L. Kozub, D. W. Bardayan, J. A. Cizewski, K. Y. Chae, J. F. Liang, C. Matei, B. H. Moazen, C. D. Nesaraja, P. D. O'Malley, W. A. Peters, S. T. Pittman, K. T. Schmitt, and M. S. Smith
Of particular interest in astrophysics is the ^{34}S(p,γ)^{35}Cl reaction, which serves as a stepping stone in thermonuclear runaway reaction chains during a nova explosion. Though the isotopes involved are all stable, the reaction rate of this significant step is not well known, due to a lack of ex…
[Phys. Rev. C 95, 045808] Published Fri Apr 28, 2017
Low-lying structure and shape evolution in neutron-rich Se isotopes
2017-04-27T10:00:00-04:00
Author(s): S. Chen
et al.Neutron-rich ^{88,90,92,94}Se isotopes were studied via in-beam γ-ray spectroscopy after nucleon removal reactions at intermediate energies at the Radioactive Isotope Beam Factory. Based on γ−γ coincidence analysis, low-lying excitation level schemes are proposed for these nuclei, including the 2_{1…
[Phys. Rev. C 95, 041302(R)] Published Thu Apr 27, 2017
Charged current neutrino interactions in hot and dense matter
2017-04-27T10:00:00-04:00
Author(s): Luke F. Roberts and Sanjay Reddy
We derive the charged current absorption rate of electron and antielectron neutrinos in dense matter using a fully relativistic approach valid at arbitrary matter degeneracy. We include mean field energy shifts due to nuclear interactions and the corrections due to weak magnetism. The rates are deri…
[Phys. Rev. C 95, 045807] Published Thu Apr 27, 2017
Examining possible neutron-halo nuclei heavier than ^{37} Mg
2017-04-26T10:00:00-04:00
Author(s): Ikuko Hamamoto
The even-Z odd-N neutron-halo nuclei, which are the lightest neutron-halo nuclei heavier than ^{37}Mg, are explored by studying the shell structure unique in weakly bound neutrons for spherical or deformed shapes. It is pointed out that due to the narrowed N=50 spherical energy gap and a few resulti…
[Phys. Rev. C 95, 044325] Published Wed Apr 26, 2017
Pion production in rare-isotope collisions
2017-04-26T10:00:00-04:00
Author(s): M. B. Tsang, J. Estee, H. Setiawan, W. G. Lynch, J. Barney, M. B. Chen, G. Cerizza, P. Danielewicz, J. Hong, P. Morfouace, R. Shane, S. Tangwancharoen, K. Zhu, T. Isobe, M. Kurata-Nishimura, J. Lukasik, T. Murakami, Z. Chajecki, and
SπRIT Collaboration
Pion energy spectra are presented for central collisions of neutron-rich ^{132}Sn+^{124}Sn and neutron-deficient ^{108}Sn+^{112}Sn systems using simulations with the Boltzmann-Uehling-Uhlenbeck transport model. These calculations, which incorporate isospin-dependent mean-field potentials for relevan…
[Phys. Rev. C 95, 044614] Published Wed Apr 26, 2017
Repulsive three-body force and channel-coupling effects via ^{12} C+ ^{12} C scattering at 100A MeV
2017-04-26T10:00:00-04:00
Author(s): W. W. Qu, G. L. Zhang, S. Terashima, T. Furumoto, Y. Ayyad, Z. Q. Chen, C. L. Guo, A. Inoue, X. Y. Le, H. J. Ong, D. Y. Pang, H. Sakaguchi, Y. Sakuragi, B. H. Sun, A. Tamii, I. Tanihata, T. F. Wang, R. Wada, and Y. Yamamoto
The angular distributions of differential cross sections of ^{12}C+^{12}C elastic and inelastic scattering populating the ground and excited states in ^{12}C up to 15 MeV excitation energy are precisely measured for the first time at an incident energy of 100A MeV to study the effect of repulsive th…
[Phys. Rev. C 95, 044616] Published Wed Apr 26, 2017
Low energy measurements of the ^{10} B(p,α) ^{7} Be reaction
2017-04-26T10:00:00-04:00
Author(s): M. Wiescher, R. J. deBoer, J. Görres, and R. E. Azuma
Background: The ^{11}B(p,2α)^{4}He reaction is being discussed as a prime candidate for advanced aneutronic fusion fuel systems. Particular interest in this reaction has recently emerged for laser driven plasma systems for energy generation and jet-propulsion systems. The lack of long-lived radioact…
[Phys. Rev. C 95, 044617] Published Wed Apr 26, 2017
Extrapolation of scattering data to the negative-energy region
2017-04-26T10:00:00-04:00
Author(s): L. D. Blokhintsev, A. S. Kadyrov, A. M. Mukhamedzhanov, and D. A. Savin
Explicit analytic expressions are derived for the effective-range function for the case when the interaction is represented by a sum of the short-range square-well and long-range Coulomb potentials. These expressions are then transformed into forms convenient for extrapolating to the negative-energy…
[Phys. Rev. C 95, 044618] Published Wed Apr 26, 2017
Nuclear structure and β-decay schemes for Te nuclides beyond N=82
2017-04-25T10:00:00-04:00
Author(s): B. Moon
et al.We study for the first time the internal structure of ^{140}Te through the β-delayed γ-ray spectroscopy of ^{140}Sb. The very neutron-rich ^{140}Sb nuclei with Z=51 and N=89 were produced by the in-flight fission of ^{238}U beams at the Radioactive Isotope Beam Factory, RIKEN. The half-life and spin…
[Phys. Rev. C 95, 044322] Published Tue Apr 25, 2017
Neutron-unbound excited states of ^{23} N
2017-04-25T10:00:00-04:00
Author(s): M. D. Jones, T. Baumann, J. Brett, J. Bullaro, P. A. DeYoung, J. E. Finck, N. Frank, K. Hammerton, J. Hinnefeld, Z. Kohley, A. N. Kuchera, J. Pereira, A. Rabeh, J. K. Smith, A. Spyrou, S. L. Stephenson, K. Stiefel, M. Tuttle-Timm, R. G. T. Zegers, and M. Thoennessen
Neutron unbound states in ^{23}N were populated via proton knockout from an 83.4 MeV/nucleon ^{24}O beam on a liquid deuterium target. The two-body decay energy displays two peaks at E_{1}∼100keV and E_{2}∼1MeV with respect to the neutron separation energy. The data are consistent with shell model c…
[Phys. Rev. C 95, 044323] Published Tue Apr 25, 2017
Multipoles model for K^{+} Λ photoproduction on the nucleon reexamined
2017-04-25T10:00:00-04:00
Author(s): T. Mart and S. Sakinah
We have updated our previous multipoles model for the kaon photoproduction process γp→K^{+}Λ by using the recently available experimental data, including the new CLAS 2016 data, and up-to-date information on the nucleon resonance properties provided by the Particle Data Group (PDG). The background a…
[Phys. Rev. C 95, 045205] Published Tue Apr 25, 2017
Effect of the final state interaction of η^{′} N on the η^{′} photoproduction off the nucleon
2017-04-25T10:00:00-04:00
Author(s): Shuntaro Sakai, Atsushi Hosaka, and Hideko Nagahiro
We investigate the η^{′} photoproduction off the nucleon with a particular interest in the effect of the final-state interaction (FSI) of the η^{′} meson and nucleon (η^{′}N) based on the three-flavor linear σ model. We find an enhancement in the cross section of the η^{′} photoproduction near the η…
[Phys. Rev. C 95, 045206] Published Tue Apr 25, 2017
Influence of the nucleon radius on the properties of slowly rotating neutron stars
2017-04-25T10:00:00-04:00
Author(s): Suparti, A. Sulaksono, and T. Mart
We have studied the effect of free space nucleon radius on the nuclear matter and slowly rotating neutron-star properties within a relativistic mean-field model with the inclusion of ω−ρ mixing nonlinear term. We use the same density-dependent radius as in our previous work. However, in the present …
[Phys. Rev. C 95, 045806] Published Tue Apr 25, 2017
Long-time drift of the isospin degree of freedom in heavy ion collisions
2017-04-24T10:00:00-04:00
Author(s): Yan Zhang (张嫣)
et al.The drift of the isospin degree of freedom (IDOF) is experimentally visualized through the wide-range angular distribution and the beam energy dependence of the isospin composition of light charged particles (LCP) produced in heavy ion collisions. It is evidenced that the net isospin transport is pr…
[Phys. Rev. C 95, 041602(R)] Published Mon Apr 24, 2017
Measurement of the beam asymmetry Σ for π^{0} and η photoproduction on the proton at E_{γ} =9 GeV
2017-04-24T10:00:00-04:00
Author(s): H. Al Ghoul
et al. (GlueX Collaboration)
We report measurements of the photon beam asymmetry Σ for the reactions γ[over ⃗]p→pπ^{0} and γ[over ⃗]p→pη from the GlueX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the pr…
[Phys. Rev. C 95, 042201(R)] Published Mon Apr 24, 2017
Luneburg-lens-like structural Pauli attractive core of the nuclear force at short distances
2017-04-24T10:00:00-04:00
Author(s): S. Ohkubo
The nuclear force has been understood to have a repulsive core at short distances, similar to a molecular force, since Jastrow proposed it in 1951 [R. Jastrow, Phys. Rev. 81, 165 (1951)]. The existence of the repulsion was experimentally confirmed from the proton-proton scattering ^{1}S_{0} phase sh…
[Phys. Rev. C 95, 044002] Published Mon Apr 24, 2017
Particle decay of proton-unbound levels in ^{12} N
2017-04-24T10:00:00-04:00
Author(s): K. A. Chipps, S. D. Pain, U. Greife, R. L. Kozub, C. D. Nesaraja, M. S. Smith, D. W. Bardayan, A. Kontos, L. E. Linhardt, M. Matos, S. T. Pittman, and P. Thompson (JENSA Collaboration)
Background: Transfer reactions are a useful tool for studying nuclear structure, particularly in the regime of low level densities and strong single-particle strengths. In addition, transfer reactions can populate levels above particle decay thresholds, allowing for the possibility of studying the s…
[Phys. Rev. C 95, 044319] Published Mon Apr 24, 2017
Correlated-Gaussian approach to linear-chain states: Case of four α particles
2017-04-24T10:00:00-04:00
Author(s): Y. Suzuki and W. Horiuchi
We show that correlated Gaussians with good angular momentum and parity provide flexible basis functions for specific elongated shape. As an application we study linear-chain states of four α particles in variation-after-projection calculations in which all the matrix elements are evaluated analytic…
[Phys. Rev. C 95, 044320] Published Mon Apr 24, 2017