Preview: Recent Articles in Phys. Rev. C
Recent Articles in Phys. Rev. C
Recent articles in Physical Review C
Published: 2017-01-19T11:48:13-05:00
Examination of experimental evidence of chaos in the bound states of ^{208} Pb
2017-01-18T10:00:00-05:00
Author(s): L. Muñoz, R. A. Molina, J. M. G. Gómez, and A. Heusler
We study the spectral fluctuations of the ^{208}Pb nucleus using the complete experimental spectrum of 151 states up to excitation energies of 6.20 MeV recently identified at the Maier-Leibnitz Laboratorium at Garching, Germany. For natural parity states the results are very close to the predictions…
[Phys. Rev. C 95, 014317] Published Wed Jan 18, 2017
Barcelona-Catania-Paris-Madrid functional with a realistic effective mass
2017-01-18T10:00:00-05:00
Author(s): M. Baldo, L. M. Robledo, P. Schuck, and X. Viñas
The Barcelona-Catania-Paris-Madrid functional recently proposed to describe nuclear structure properties of finite nuclei is generalized as to include a realistic effective mass. The resulting functional is as good as the previous one in describing binding energies, radii, deformation properties, et…
[Phys. Rev. C 95, 014318] Published Wed Jan 18, 2017
Systematic study of α decay for odd-A nuclei within a two-potential approach
2017-01-18T10:00:00-05:00
Author(s): Xiao-Dong Sun, Chao Duan, Jun-Gang Deng, Ping Guo, and Xiao-Hua Li
α decay is usually associated with both ground and low-lying isomeric states of heavy and superheavy nuclei, and the unpaired nucleon plays a key role in α decay. In this work, we systematically studied the α decay half-lives of odd-A nuclei, including both favored and unfavored α decay within the t…
[Phys. Rev. C 95, 014319] Published Wed Jan 18, 2017
Microscopic dynamics simulations of multinucleon transfer in ^{86} Kr+ ^{64} Ni at 25 MeV/nucleon
2017-01-18T10:00:00-05:00
Author(s): Hong Yao and Ning Wang
Multinucleon transfer in ^{86}Kr+^{64}Ni at an incident energy of 25 MeV/nucleon is for the first time investigated with a microscopic dynamics model: improved quantum molecular dynamics (ImQMD) model. The measured isotope distributions are reasonably well reproduced by using the ImQMD model togethe…
[Phys. Rev. C 95, 014607] Published Wed Jan 18, 2017
Collectivity and electromagnetic radiation in small systems
2017-01-18T10:00:00-05:00
Author(s): Chun Shen, Jean-François Paquet, Gabriel S. Denicol, Sangyong Jeon, and Charles Gale
Collective behavior has been observed in hadronic measurements of high multiplicity proton+lead collisions at the Large Hadron Collider, as well as in (proton, deuteron, helium-3) + gold collisions at the Relativistic Heavy Ion Collider. To better understand the evolution dynamics and the properties…
[Phys. Rev. C 95, 014906] Published Wed Jan 18, 2017
α-decay properties of ^{296} 118 from double-folding potentials
2017-01-17T10:00:00-05:00
Author(s): Peter Mohr
α−decay properties of the yet unknown nucleus ^{296}118 are predicted using the systematic behavior of parameters of α-nucleus double-folding potentials. The results are Q_{α}=11.655±0.095MeV and T_{1/2}=0.825ms with an uncertainty of about a factor of 4.
[Phys. Rev. C 95, 011302(R)] Published Tue Jan 17, 2017
Phenomenological model for light-projectile breakup
2017-01-17T10:00:00-05:00
Author(s): C. Kalbach
Background: Projectile breakup can make a large contribution to reactions induced by projectiles with mass numbers 2, 3, and 4, yet there is no global model for it and no clear agreement on the details of the reaction mechanism.
[Phys. Rev. C 95, 014606] Published Tue Jan 17, 2017
Heavy quarkonium photoproduction in ultrarelativistic heavy ion collisions
2017-01-17T10:00:00-05:00
Author(s): Gong-Ming Yu, Yang-Bing Cai, Yun-De Li, and Jian-Song Wang
Based on the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD), we calculate the production cross section for the charmonium [J/ψ, ψ(2S), χ_{cJ}, η_{c}, and h_{c}] and the bottomonium [Υ(nS), χ_{bJ}, η_{b}, and h_{b}] produced by the hard photoproduction processes and fragmen…
[Phys. Rev. C 95, 014905] Published Tue Jan 17, 2017
Role of a triangle singularity in the γp→K^{+} Λ(1405) reaction
2017-01-17T10:00:00-05:00
Author(s): En Wang, Ju-Jun Xie, Wei-Hong Liang, Feng-Kun Guo, and Eulogio Oset
We show the effects of a triangle singularity mechanism for the γp→K^{+}Λ(1405) reaction. The mechanism has a N^{*} resonance around 2030 MeV, which decays into K^{*}Σ. The K^{*} decays to K^{+}π, and the πΣ merge to form the Λ(1405). This mechanism produces a peak around sqrt[s]=2110 MeV, and has i…
[Phys. Rev. C 95, 015205] Published Tue Jan 17, 2017
Spectrum of shear modes in the neutron-star crust: Estimating the nuclear-physics uncertainties
2017-01-17T10:00:00-05:00
Author(s): I. Tews
I construct a model of the inner crust of neutron stars using interactions from chiral effective field theory (EFT) in order to calculate its equation of state (EOS), shear properties, and the spectrum of crustal shear modes. I systematically study uncertainties associated with the nuclear physics i…
[Phys. Rev. C 95, 015803] Published Tue Jan 17, 2017
Surface tension of highly magnetized degenerate quark matter
2017-01-17T10:00:00-05:00
Author(s): G. Lugones and A. G. Grunfeld
We study the surface tension of highly magnetized three-flavor quark matter within the formalism of multiple reflection expansion. Quark matter is described as a mixture of free Fermi gases composed of quarks u, d, s and electrons in chemical equilibrium under weak interactions. Due to the presence …
[Phys. Rev. C 95, 015804] Published Tue Jan 17, 2017
Microscopic method for E0 transition matrix elements
2017-01-13T10:00:00-05:00
Author(s): B. A. Brown, A. B. Garnsworthy, T. Kibédi, and A. E. Stuchbery
We present a microscopic model for electric monopole (E0) transition matrix elements by combining a configuration interaction model for orbital occupations with an energy-density functional model for the single-particle potential and radial wave functions. The configuration interaction model is used…
[Phys. Rev. C 95, 011301(R)] Published Fri Jan 13, 2017
β-decay study of the T_{z} =−2 proton-rich nucleus ^{20} Mg
2017-01-13T10:00:00-05:00
Author(s): L. J. Sun (孙立杰)
et al.The β decay of the drip-line nucleus ^{20}Mg gives important information on key astrophysical resonances in ^{20}Na, which are relevant to the onset of the rapid proton capture process. A detailed β-decay spectroscopic study of ^{20}Mg was performed by a continuous-implantation method. A detection s…
[Phys. Rev. C 95, 014314] Published Fri Jan 13, 2017
Influence of pairing correlations on the radius of neutron-rich nuclei
2017-01-13T10:00:00-05:00
Author(s): Ying Zhang, Ying Chen, Jie Meng, and Peter Ring
The influence of pairing correlations on the neutron root mean square (rms) radius of nuclei is investigated in the framework of self-consistent Skyrme Hartree-Fock-Bogoliubov calculations. The continuum is treated appropriately by the Green's function techniques. As an example the nucleus ^{124}Zr …
[Phys. Rev. C 95, 014316] Published Fri Jan 13, 2017
Interaction of three fission fragments and yields of various ternary fragments
2017-01-13T10:00:00-05:00
Author(s): V. Yu. Denisov, N. A. Pilipenko, and I. Yu. Sedykh
The interaction potential energy of the three deformed fragments formed in fission of ^{252}Cf is studied for various combinations of three-fragment fission. The lowest height of the potential energy ridge between three touching and separated deformed fragments is sought. The excitation energies of …
[Phys. Rev. C 95, 014605] Published Fri Jan 13, 2017
Magnetic catalysis of a finite-size pion condensate
2017-01-13T10:00:00-05:00
Author(s): Alejandro Ayala, Pedro Mercado, and C. Villavicencio
We study the Bose-Einstein condensation of a finite-size pion gas subject to the influence of a magnetic field. We find the expressions for the critical chemical potential and temperature for the onset of condensation. We show that for values of the external magnetic flux larger than the elemental f…
[Phys. Rev. C 95, 014904] Published Fri Jan 13, 2017
Experimental study of the isovector giant dipole resonance in ^{80} Zr and ^{81} Rb
2017-01-12T10:00:00-05:00
Author(s): S. Ceruti
et al.The isovector giant dipole resonance (IVGDR) γ decay was measured in the compound nuclei ^{80}Zr and ^{81}Rb at an excitation energy of E^{*}=54 MeV. The fusion reaction ^{40}Ca+^{40}Ca at E_{beam}=136 MeV was used to form the compound nucleus ^{80}Zr, while the reaction ^{37}Cl+^{44}Ca at E_{beam}=…
[Phys. Rev. C 95, 014312] Published Thu Jan 12, 2017
Coulomb and nuclear effects in breakup and reaction cross sections
2017-01-12T10:00:00-05:00
Author(s): P. Descouvemont, L. F. Canto, and M. S. Hussein
We use a three-body continuum discretized coupled channel (CDCC) model to investigate Coulomb and nuclear effects in breakup and reaction cross sections. The breakup of the projectile is simulated by a finite number of square integrable wave functions. First we show that the scattering matrices can …
[Phys. Rev. C 95, 014604] Published Thu Jan 12, 2017
K^{*} vector meson resonance dynamics in heavy-ion collisions
2017-01-12T10:00:00-05:00
Author(s): Andrej Ilner, Daniel Cabrera, Christina Markert, and Elena Bratkovskaya
We study the strange vector meson (K^{*},K[over ¯]^{*}) dynamics in relativistic heavy-ion collisions based on the microscopic parton-hadron-string dynamics (PHSD) transport approach which incorporates partonic and hadronic degrees of freedom, a phase transition from hadronic to partonic matter—quar…
[Phys. Rev. C 95, 014903] Published Thu Jan 12, 2017
Determination of the η ^{3} He threshold structure from the low energy pd→η ^{3} He reaction
2017-01-12T10:00:00-05:00
Author(s): Ju-Jun Xie, Wei-Hong Liang, Eulogio Oset, Pawel Moskal, Magdalena Skurzok, and Colin Wilkin
We analyze the data on cross sections and asymmetries for the pd→η^{3}He reaction close to threshold and look for bound states of the η^{3}He system. Rather than parameterizing the scattering matrix, as is usually done, we develop a framework in which the η^{3}He optical potential is the key ingredi…
[Phys. Rev. C 95, 015202] Published Thu Jan 12, 2017
Model selection for pion photoproduction
2017-01-12T10:00:00-05:00
Author(s): J. Landay, M. Döring, C. Fernández-Ramírez, B. Hu, and R. Molina
Partial-wave analysis of meson and photon-induced reactions is needed to enable the comparison of many theoretical approaches to data. In both energy-dependent and independent parametrizations of partial waves, the selection of the model amplitude is crucial. Principles of the S matrix are implement…
[Phys. Rev. C 95, 015203] Published Thu Jan 12, 2017
Dependence of fusion on isospin dynamics
2017-01-11T10:00:00-05:00
Author(s): K. Godbey, A. S. Umar, and C. Simenel
We introduce a new microscopic approach to calculate the dependence of fusion barriers and cross sections on isospin dynamics. The method is based on the time-dependent Hartree–Fock theory and the isoscalar and isovector properties of the energy density functional (EDF). The contribution to the fusi…
[Phys. Rev. C 95, 011601(R)] Published Wed Jan 11, 2017
Ground-state properties of ^{5} H from the ^{6} He(d, ^{3} He) ^{5} H reaction
2017-01-11T10:00:00-05:00
Author(s): A. H. Wuosmaa, S. Bedoor, K. W. Brown, W. W. Buhro, Z. Chajecki, R. J. Charity, W. G. Lynch, J. Manfredi, S. T. Marley, D. G. McNeel, A. S. Newton, D. V. Shetty, R. H. Showalter, L. G. Sobotka, M. B. Tsang, J. R. Winkelbauer, and R. B. Wiringa
We have studied the ground state of the unbound, very neutron-rich isotope of hydrogen ^{5}H, using the ^{6}He(d,^{3}He)^{5}H reaction in inverse kinematics at a bombarding energy of E(^{6}He)=55A MeV. The present results suggest a ground-state resonance energy E_{R}=2.4±0.3 MeV above the ^{3}H+2n t…
[Phys. Rev. C 95, 014310] Published Wed Jan 11, 2017
Improved semi-empirical relationship for α-decay half-lives
2017-01-11T10:00:00-05:00
Author(s): Shan Zhang (张闪), Yanli Zhang (张彦立), Jianpo Cui (崔建坡), and Yanzhao Wang (王艳召)
An improved semi-empirical relationship for α-decay half-lives is proposed by introducing a precise radius formula and an analytic expression for preformation probability. By using the improved relationship, the α-decay half-lives of 421 nuclei are calculated. It is shown that the accuracy of this s…
[Phys. Rev. C 95, 014311] Published Wed Jan 11, 2017
Formation of hypernuclei in heavy-ion collisions around the threshold energies
2017-01-11T10:00:00-05:00
Author(s): A. S. Botvina, K. K. Gudima, J. Steinheimer, M. Bleicher, and J. Pochodzalla
In relativistic ion collisions there are excellent opportunities to produce and investigate hypernuclei. We have systematically studied the formation of hypernuclear spectator residues in peripheral heavy-ion collisions with the transport DCM and UrQMD models. The hyperon capture was calculated with…
[Phys. Rev. C 95, 014902] Published Wed Jan 11, 2017
ϕ meson self-energy in nuclear matter from ϕN resonant interactions
2017-01-11T10:00:00-05:00
Author(s): D. Cabrera, A. N. Hiller Blin, and M. J. Vicente Vacas
The ϕ-meson properties in cold nuclear matter are investigated by implementing resonant ϕN interactions as described in effective approaches including the unitarization of scattering amplitudes. Several N^{*}-like states are dynamically generated in these models around 2 GeV, in the vicinity of the …
[Phys. Rev. C 95, 015201] Published Wed Jan 11, 2017
Gap-bridging enhancement of modified Urca processes in nuclear matter
2017-01-11T10:00:00-05:00
Author(s): Mark G. Alford and Kamal Pangeni
In nuclear matter at neutron-star densities and temperatures, Cooper pairing leads to the formation of a gap in the nucleon excitation spectra resulting in exponentially strong Boltzmann suppression of many transport coefficients. Previous calculations have shown evidence that density oscillations o…
[Phys. Rev. C 95, 015802] Published Wed Jan 11, 2017
Reexamination of proton rms radii from low-q power expansions
2017-01-10T10:00:00-05:00
Author(s): Ingo Sick and Dirk Trautmann
Several recent publications claim that the proton charge rms radius resulting from the analysis of electron-scattering data restricted to low-momentum transfer agrees with the radius determined from muonic hydrogen, in contrast to the radius resulting from analyses of the full (e,e) data set which i…
[Phys. Rev. C 95, 012501(R)] Published Tue Jan 10, 2017
Light-front spin-dependent spectral function and nucleon momentum distributions for a three-body system
2017-01-10T10:00:00-05:00
Author(s): Alessio Del Dotto, Emanuele Pace, Giovanni Salmè, and Sergio Scopetta
Poincaré covariant definitions for the spin-dependent spectral function and for the momentum distributions within the light-front Hamiltonian dynamics are proposed for a three-fermion bound system, starting from the light-front wave function of the system. The adopted approach is based on the Bakamj…
[Phys. Rev. C 95, 014001] Published Tue Jan 10, 2017
Lifetime measurements in ^{100} Ru
2017-01-10T10:00:00-05:00
Author(s): T. Konstantinopoulos
et al.The nucleus ^{100}Ru appears to be a good candidate for the E(5) critical point symmetry which describes the U(5)-SO(6) shape phase transition. To investigate this point with respect to the electromagnetic transition strengths, lifetime measurements of its yrast states have been performed using the …
[Phys. Rev. C 95, 014309] Published Tue Jan 10, 2017
Investigation of the anomalously low B(E2;4_{1}^{+} →2_{1}^{+} )/B(E2;2_{1}^{+} →0_{1}^{+} ) ratio in ^{134} Ce through lifetime measurements
2017-01-09T10:00:00-05:00
Author(s): B. J. Zhu (朱保吉), C. B. Li (李聪博), X. G. Wu (吴晓光), J. Zhong (钟健), Q. M. Chen (陈启明), Y. Zheng (郑云), C. Y. He (贺创业), W. K. Zhou (周文奎), L. T. Deng (邓利涛), and G. S. Li (李广生)
The existing experimental value of the ratio B_{4/2}≡B(E2;4_{1}^{+}→2_{1}^{+})/B(E2;2_{1}^{+}→0_{1}^{+}) in ^{134}Ce is less than unity, which is outside the range allowed by current collective models and is highly anomalous. In the present work, new lifetime measurements of excited states in ^{134}…
[Phys. Rev. C 95, 014308] Published Mon Jan 09, 2017
Correlating double-difference of charge radii with quadrupole deformation and B(E2) in atomic nuclei
2017-01-06T10:00:00-05:00
Author(s): B. H. Sun, C. Y. Liu, and H. X. Wang
A good linear correlation is found between the double-difference of charge radius δR_{2p−2n}(Z,N) with that of quadrupole deformation data in even-even nuclei. This results in a further improved charge radius relation that holds in a precision of about 5×10^{−3} fm. The new relation can be generaliz…
[Phys. Rev. C 95, 014307] Published Fri Jan 06, 2017
Decay of the I^{π} =8^{−} isomeric state in ^{134} Nd and ^{184} Pt studied by electron and γ spectroscopy
2017-01-05T10:00:00-05:00
Author(s): J. Perkowski, J. Andrzejewski, Ch. Droste, Ł. Janiak, E. Grodner, S. G. Rohoziński, L. Próchniak, J. Srebrny, J. Samorajczyk-Pyśk, T. Abraham, K. Hadyńska-Klȩk, M. Kisieliński, M. Komorowska, M. Kowalczyk, J. Kownacki, T. Marchlewski, J. Mierzejewski, P. Napiorkowski, A. Stolarz, A. Korman, and M. Zielińska
The properties of the K-isomer decays in the ^{134}Nd and ^{184}Pt nuclei have been investigated. Measurements were carried out in e−γ and γ−γ coincidence modes using electron spectrometers coupled to the central European Array for Gamma Levels Evaluations at the Heavy Ion Laboratory of the Universi…
[Phys. Rev. C 95, 014305] Published Thu Jan 05, 2017
Ab initio no-core properties of ^{7} Li and ^{7} Be with the JISP16 and chiral NNLO_{opt} interactions
2017-01-05T10:00:00-05:00
Author(s): Taihua Heng, James P. Vary, and Pieter Maris
We investigate the properties of ^{7}Li with the JISP16 and chiral NNLO_{opt} at next-to-next-to-leading order (NNLO) nucleon-nucleon interactions and ^{7}Be with the JISP16 interaction in the ab initio no-core full configuration approach. We calculate selected observables that include energy spectr…
[Phys. Rev. C 95, 014306] Published Thu Jan 05, 2017
Collinear cluster tri-partition: Kinematics constraints and stability of collinearity
2017-01-05T10:00:00-05:00
Author(s): P. Holmvall, U. Köster, A. Heinz, and T. Nilsson
Background: A new mode of nuclear fission has been proposed by the FOBOS Collaboration, called collinear cluster tri-partition (CCT), and suggests that three heavy fission fragments can be emitted perfectly collinearly in low-energy fission. This claim is based on indirect observations via missing-e…
[Phys. Rev. C 95, 014602] Published Thu Jan 05, 2017
Effect of hyperons on phase coexistence in strange matter
2017-01-05T10:00:00-05:00
Author(s): P. Das, S. Mallik, and G. Chaudhuri
The study of the liquid gas phase transition in the fragmentation of nuclei in heavy ion collisions has been extended to the strangeness sector using the statistical model for multifragmentation. Helmholtz's free energy, specific heat, and a few other thermodynamic observables have been analyzed in …
[Phys. Rev. C 95, 014603] Published Thu Jan 05, 2017
Adiabatic fission barriers in superheavy nuclei
2017-01-04T10:00:00-05:00
Author(s): P. Jachimowicz, M. Kowal, and J. Skalski
Using the microscopic-macroscopic model based on the deformed Woods–Saxon single-particle potential and the Yukawa-plus-exponential macroscopic energy, we calculated static fission barriers B_{f} for 1305 heavy and superheavy nuclei 98≤Z≤126, including even-even, odd-even, even-odd and odd-odd syste…
[Phys. Rev. C 95, 014303] Published Wed Jan 04, 2017
β-decay properties of neutron-rich rare-earth isotopes
2017-01-04T10:00:00-05:00
Author(s): P. Sarriguren
In this paper, β-decay properties of even-even neutron-rich isotopes in the rare-earth mass region are studied within a microscopic theoretical approach based on a proton-neutron quasiparticle random-phase approximation. The underlying mean field is constructed self-consistently from a deformed Hart…
[Phys. Rev. C 95, 014304] Published Wed Jan 04, 2017
Tidal deformability of neutron and hyperon stars within relativistic mean field equations of state
2017-01-04T10:00:00-05:00
Author(s): Bharat Kumar, S. K. Biswal, and S. K. Patra
We systematically study the tidal deformability for neutron and hyperon stars using relativistic mean field equations of state (EOSs). The tidal effect plays an important role during the early part of the evolution of compact binaries. Although, the deformability associated with the EOSs has a small…
[Phys. Rev. C 95, 015801] Published Wed Jan 04, 2017
Deformed band structures at high spin in ^{200} Tl
2017-01-03T10:00:00-05:00
Author(s): Soumik Bhattacharya, S. Bhattacharyya, S. Das Gupta, H. Pai, G. Mukherjee, R. Palit, F. R. Xu, Q. Wu, A. Shrivastava, Md. A. Asgar, R. Banik, T. Bhattacharjee, S. Chanda, A. Chatterjee, A. Goswami, V. Nanal, S. K. Pandit, S. Saha, J. Sethi, T. Roy, and S. Thakur
High-spin band structures of ^{200}Tl have been studied by γ-ray spectroscopic methods using the ^{198}Pt(^{7}Li,5n)^{200}Tl reaction at 45 MeV of beam energy. The level scheme of ^{200}Tl has been extended significantly and several new band structures have been established with the observation of 6…
[Phys. Rev. C 95, 014301] Published Tue Jan 03, 2017
Competition between α decay and proton radioactivity of neutron-deficient nuclei
2017-01-03T10:00:00-05:00
Author(s): Y. Z. Wang (王艳召), J. P. Cui (崔建坡), Y. L. Zhang (张彦立), S. Zhang (张闪), and J. Z. Gu (顾建中)
The α decay and proton radioactivity half-lives of some neutron-deficient nuclei are calculated using an effective liquid drop model (ELDM). It is found that the experimental half-lives of the two decay modes and the dominant decay mode can be well reproduced by the ELDM. Moreover, the predicted pen…
[Phys. Rev. C 95, 014302] Published Tue Jan 03, 2017
Multiplicity fluctuation and correlation of identified baryons in a quark combination model
2017-01-03T10:00:00-05:00
Author(s): Jun Song, Hai-hong Li, Rui-qin Wang, and Feng-lan Shao
The dynamical multiplicity fluctuations and correlations of identified baryons and antibaryons produced by the hadronization of a bulk quark system are systematically studied in a quark combination model. Starting from the most basic dynamics of the quark combination which is necessary for multiplic…
[Phys. Rev. C 95, 014901] Published Tue Jan 03, 2017
Monopole transition strength function of ^{12} C in a three-α model
2016-12-30T10:00:00-05:00
Author(s): Souichi Ishikawa
The energy-level structure of the ^{12}C nucleus at a few MeV above the three-α(3α) threshold is still unsatisfactorily known. For instance, most microscopic calculations predicted that there exist one 0^{+} state in this energy region besides the well-known Hoyle state, whereas some experimental an…
[Phys. Rev. C 94, 061603(R)] Published Fri Dec 30, 2016
Extraction of structure functions for lepton-nucleus scattering in the quasi-elastic region
2016-12-30T10:00:00-05:00
Author(s): K. S. Kim, Hungchong Kim, Myung-Ki Cheoun, and W. Y. So
Within the framework of a relativistic single-particle model, we calculate inclusive electron-nucleus scattering by electromagnetic current, and neutrino-nucleus scattering by neutral and charged current in the quasi-elastic region. The longitudinal, the transverse, and the transverse-interference s…
[Phys. Rev. C 94, 064619] Published Fri Dec 30, 2016
Elastic scattering and breakup of ^{11} Be on deuterons at 26.9A MeV
2016-12-30T10:00:00-05:00
Author(s): J. Chen
et al.The elastic scattering and breakup reactions of the halo nucleus ^{11}Be on deuterons at an incident energy of 26.9A MeV are reported for the first time. Special attention has been paid to the determination and subtraction of the proton contaminations in the deuterated polyethylene (CD_{2})_{n} targ…
[Phys. Rev. C 94, 064620] Published Fri Dec 30, 2016
Effects of the symmetry energy in the ^{132} Sn+ ^{124} Sn reaction at 300 MeV/nucleon
2016-12-30T10:00:00-05:00
Author(s): Shan-Jing Cheng, Gao-Chan Yong, and De-Hua Wen
Based on the recently updated isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model, we studied the effects of symmetry energy on the neutron to proton ratio n/p and the π^{−}/π^{+} ratio in the central ^{132}Sn+^{124}Sn reaction at 300 MeV/nucleon. It is found that the n/p ratio and …
[Phys. Rev. C 94, 064621] Published Fri Dec 30, 2016
In-beam γ-ray spectroscopy of ^{38–42} S
2016-12-29T10:00:00-05:00
Author(s): E. Lunderberg, A. Gade, V. Bader, T. Baugher, D. Bazin, J. S. Berryman, B. A. Brown, D. J. Hartley, F. Recchia, S. R. Stroberg, D. Weisshaar, and K. Wimmer
The low-energy excitation level schemes of the neutron-rich ^{38–42}S isotopes are investigated via in-beam γ-ray spectroscopy following the fragmentation of ^{48}Ca and ^{46}Ar projectiles on a ^{12}C target at intermediate beam energies. Information on γγ coincidences complemented by comparisons t…
[Phys. Rev. C 94, 064327] Published Thu Dec 29, 2016
Competition between fermions and bosons in nuclear matter at low densities and finite temperatures
2016-12-29T10:00:00-05:00
Author(s): J. Mabiala, H. Zheng, A. Bonasera, Z. Kohley, and S. J. Yennello
We derive the free energy for fermions and bosons from fragmentation data. Inspired by the symmetry and pairing energy of the Weizsäcker mass formula, we obtain the free energy of fermions (nucleons) and bosons (alphas and deuterons) using Landau's free-energy approach. We confirm previously obtaine…
[Phys. Rev. C 94, 064617] Published Thu Dec 29, 2016
Precise measurement of near-barrier ^{8} He+ ^{208} Pb elastic scattering: Comparison with ^{6} He
2016-12-29T10:00:00-05:00
Author(s): G. Marquínez-Durán
et al.Dramatic differences in the elastic scattering of the neutron rich nuclei ^{6}He and ^{8}He are found when new high quality data for the ^{8}He+^{208}Pb system are compared with previously published ^{6}He+^{208}Pb data at the same laboratory frame incident energy. The new ^{8}He data are of the sam…
[Phys. Rev. C 94, 064618] Published Thu Dec 29, 2016
Extended Skyrme interactions for nuclear matter, finite nuclei, and neutron stars
2016-12-28T10:00:00-05:00
Author(s): Zhen Zhang and Lie-Wen Chen
Recent progress in theory, experiment, and observation challenges the mean-field models by using the conventional Skyrme interaction, suggesting that the extension of the conventional Skyrme interaction is necessary. In this work, by fitting the experimental data of a number of finite nuclei togethe…
[Phys. Rev. C 94, 064326] Published Wed Dec 28, 2016
Multinucleon transfer reactions in the ^{40} Ar+ ^{208} Pb system
2016-12-28T10:00:00-05:00
Author(s): T. Mijatović, S. Szilner, L. Corradi, D. Montanari, G. Pollarolo, E. Fioretto, A. Gadea, A. Goasduff, D. Jelavić Malenica, N. Mărginean, M. Milin, G. Montagnoli, F. Scarlassara, N. Soić, A. M. Stefanini, C. A. Ur, and J. J. Valiente-Dobón
We measured multinucleon transfer reactions in the ^{40}Ar+^{208}Pb system at an energy close to the Coulomb barrier, by employing the PRISMA magnetic spectrometer. We extracted differential and total cross sections of the different transfer channels, with a careful investigation of the total kineti…
[Phys. Rev. C 94, 064616] Published Wed Dec 28, 2016
Quark-mass dependence of the H dibaryon in ΛΛ scattering
2016-12-28T10:00:00-05:00
Author(s): Yasuhiro Yamaguchi and Tetsuo Hyodo
We study the quark mass dependence of the H dibaryon in the strangeness S=−2 baryon-baryon scattering. A low-energy effective field theory is used to describe the coupled-channel scattering, in which the quark mass dependence is incorporated so as to reproduce the lattice QCD data by the HAL QCD col…
[Phys. Rev. C 94, 065207] Published Wed Dec 28, 2016
Resonant, direct, and transfer breakup of ^{6} Li by ^{112} Sn
2016-12-27T10:00:00-05:00
Author(s): D. Chattopadhyay, S. Santra, A. Pal, A. Kundu, K. Ramachandran, R. Tripathi, D. Sarkar, S. Sodaye, B. K. Nayak, A. Saxena, and S. Kailas
Projectile breakup cross sections in the ^{6}Li+^{112}Sn reaction have been measured at two beam energies, 30 and 22 MeV. Cross sections for sequential breakup of ^{6}Li into α+d via its resonant state of 1^{+} (5.65 MeV) in the continuum have been measured for the first time along with two other do…
[Phys. Rev. C 94, 061602(R)] Published Tue Dec 27, 2016
Chiral potential renormalized in harmonic-oscillator space
2016-12-27T10:00:00-05:00
Author(s): C.-J. Yang
We renormalize the chiral effective field theory potential in harmonic-oscillator (HO) model space. The low energy constants (LECs) are utilized to absorb not just the ultraviolet part of the physics due to the cutoff, but also the infrared part due to the truncation of model space. We use the inver…
[Phys. Rev. C 94, 064004] Published Tue Dec 27, 2016
Toward a comprehensive description of decay properties for uranium isotopes
2016-12-27T10:00:00-05:00
Author(s): Yibin Qian and Zhongzhou Ren
Within the enhanced density dependent cluster model, with specific concern for density distributions in related nuclei, we investigate α decay and cluster radioactivity in uranium isotopes in the range 217≤A≤243. The available experimental data are found to be well reproduced, especially including t…
[Phys. Rev. C 94, 064321] Published Tue Dec 27, 2016
μs isomers of ^{158,160} Nd
2016-12-27T10:00:00-05:00
Author(s): E. Ideguchi
et al.The neutron-rich nuclei ^{158,160}Nd have been studied via delayed γ-ray spectroscopy of μs isomeric states at the RIBF facility, RIKEN. These nuclei were produced following the projectile fission of a 345 AMeV^{238}U beam and delayed γ rays were detected by the EURICA cluster Ge array. The isomeric…
[Phys. Rev. C 94, 064322] Published Tue Dec 27, 2016
Nucleon localization and fragment formation in nuclear fission
2016-12-27T10:00:00-05:00
Author(s): C. L. Zhang (张春莉), B. Schuetrumpf, and W. Nazarewicz
Background: An electron localization measure was originally introduced to characterize chemical bond structures in molecules. Recently, a nucleon localization based on Hartree-Fock densities has been introduced to investigate α-cluster structures in light nuclei. Compared to the local nucleonic dens…
[Phys. Rev. C 94, 064323] Published Tue Dec 27, 2016
Consistent description of ^{12} C and ^{16} O using a finite-range three-body interaction
2016-12-27T10:00:00-05:00
Author(s): N. Itagaki
Consistent description of ^{12}C and ^{16}O has been a long-standing problem of microscopic α cluster models, where the wave function is fully antisymmetrized and the effective interaction is applied not between α clusters but between nucleons. When the effective interaction is designed to reproduce…
[Phys. Rev. C 94, 064324] Published Tue Dec 27, 2016
Sum rule study for double Gamow-Teller states
2016-12-27T10:00:00-05:00
Author(s): H. Sagawa and T. Uesaka
We study the sum rules of double Gamow-Teller (DGT) excitations through double spin-isospin operator (σt_{−})^{2}. In general, 2^{+} states in the grand-daughter nuclei have dominant transition strength in DGT excitations and 0^{+} states are weak, except in T=1 mother nuclei in which 0^{+} strength…
[Phys. Rev. C 94, 064325] Published Tue Dec 27, 2016
Unexpected asymmetry of the charge distribution in the fission of ^{222,224} Th at high excitation energies
2016-12-27T10:00:00-05:00
Author(s): H. Paşca, A. V. Andreev, G. G. Adamian, and N. V. Antonenko
Using the improved scission-point model, the isotopic trends of the charge distribution of fission fragments are studied in induced fission of even-even Th isotopes. The calculated results are in good agreement with available experimental data. With increasing neutron number the transition from symm…
[Phys. Rev. C 94, 064614] Published Tue Dec 27, 2016
Ternary fission of a heavy nuclear system within a three-center shell model
2016-12-27T10:00:00-05:00
Author(s): A. V. Karpov
Background: Since more than 40 years of theoretical and experimental studies of true ternary fission, one is still quite far from its understanding. The true ternary fission channel, being strongly suppressed by the macroscopic properties of the potential energy, may, however, be present with a sign…
[Phys. Rev. C 94, 064615] Published Tue Dec 27, 2016
Simultaneous measurement of β-delayed proton and γ decay of ^{27} P
2016-12-27T10:00:00-05:00
Author(s): E. McCleskey, A. Banu, M. McCleskey, T. Davinson, D. T. Doherty, G. Lotay, B. T. Roeder, A. Saastamoinen, A. Spiridon, L. Trache, J. P. Wallace, P. J. Woods, and R. E. Tribble
This is the first study of ^{27}P to measure both the β-delayed proton and β-delayed γ decays. While no new proton groups in the astrophysically interesting energy region of 300–400 keV were observed, a new upper limit on the proton branching of 0.16% was estimated. Several new γ-ray lines were obse…
[Phys. Rev. C 94, 065806] Published Tue Dec 27, 2016
Measurements of branching ratios for η decays into charged particles
2016-12-23T10:00:00-05:00
Author(s): P. Adlarson
et al. (WASA-at-COSY Collaboration)
The WASA-at-COSY experiment has collected 3×10^{7} events with η mesons produced via the reaction pd→^{3}Heη at T=1.0GeV. Using this data set, we evaluate the branching ratios of the decays η→π^{+}π^{−}γ, η→e^{+}e^{−}γ, η→π^{+}π^{−}e^{+}e^{−}, and η→e^{+}e^{−}e^{+}e^{−}. The branching ratios are nor…
[Phys. Rev. C 94, 065206] Published Fri Dec 23, 2016
Late-time emission of prompt fission γ rays
2016-12-22T10:00:00-05:00
Author(s): P. Talou, T. Kawano, I. Stetcu, J. P. Lestone, E. McKigney, and M. B. Chadwick
The emission of prompt fission γ rays within a few nanoseconds to a few microseconds following the scission point is studied in the Hauser-Feshbach formalism applied to the deexcitation of primary excited fission fragments. Neutron and γ-ray evaporations from fully accelerated fission fragments are …
[Phys. Rev. C 94, 064613] Published Thu Dec 22, 2016
Baryon transition form factors at the pole
2016-12-21T10:00:00-05:00
Author(s): L. Tiator, M. Döring, R. L. Workman, M. Hadžimehmedović, H. Osmanović, R. Omerović, J. Stahov, and A. Švarc
Electromagnetic resonance properties are uniquely defined at the pole and do not depend on the separation of the resonance from background or the decay channel. Photon-nucleon branching ratios are nowadays often quoted at the pole, and we generalize the considerations to the case of virtual photons.…
[Phys. Rev. C 94, 065204] Published Wed Dec 21, 2016
Toward establishing low-lying Λ and Σ hyperon resonances with the K [over ¯] +d→π+Y+N reaction
2016-12-21T10:00:00-05:00
Author(s): H. Kamano and T.-S. H. Lee
A model for the K[over ¯]d→πYN reactions with Y=Λ,Σ is developed, aiming at establishing the low-lying Λ and Σ hyperon resonances through analyzing the forthcoming data from the J-PARC E31 experiment. The off-shell amplitudes generated from the dynamical coupled-channels (DCC) model, which was devel…
[Phys. Rev. C 94, 065205] Published Wed Dec 21, 2016
Mean-field approaches for Ξ^{−} hypernuclei and current experimental data
2016-12-20T10:00:00-05:00
Author(s): T. T. Sun (孙亭亭), E. Hiyama, H. Sagawa, H.-J. Schulze, and J. Meng (孟杰)
Motivated by the recently observed hypernucleus (Kiso event) _{Ξ}^{15}C (^{14}N+Ξ^{−}), we identify the state of this system theoretically within the framework of the relativistic-mean-field and Skyrme–Hartree–Fock models. The ΞN interactions are constructed to reproduce the two possibly observed Ξ^…
[Phys. Rev. C 94, 064319] Published Tue Dec 20, 2016
Shell model states in the continuum
2016-12-20T10:00:00-05:00
Author(s): A. M. Shirokov, A. I. Mazur, I. A. Mazur, and J. P. Vary
We suggest a method for calculating scattering phase shifts and energies and widths of resonances which utilizes only eigenenergies obtained in variational calculations with oscillator basis and their dependence on oscillator basis spacing ℏΩ. We make use of simple expressions for the S matrix at ei…
[Phys. Rev. C 94, 064320] Published Tue Dec 20, 2016
Microscopic optical potential for ^{4} He scattering based on the effective Skyrme interaction
2016-12-20T10:00:00-05:00
Author(s): V. I. Kuprikov and V. V. Pilipenko
Microscopic optical potential of ^{4}He interaction with nuclei is constructed by means of the single-folding model using the nucleon-nucleus optical potentials, which earlier were successfully applied to describing the neutron and proton scattering and are obtained from approximate calculations of …
[Phys. Rev. C 94, 064612] Published Tue Dec 20, 2016
Geometric approach to nuclear pasta phases
2016-12-20T10:00:00-05:00
Author(s): Sebastian Kubis and Włodzimierz Wójcik
By use of the variational methods and differential geometry in the framework of the liquid drop model we formulate appropriate equilibrium equations for pasta phases with imposed periodicity. The extension of the Young-Laplace equation in the case of charged fluid is obtained. The β equilibrium and …
[Phys. Rev. C 94, 065805] Published Tue Dec 20, 2016
Neutron-γ competition for β-delayed neutron emission
2016-12-19T10:00:00-05:00
Author(s): M. R. Mumpower, T. Kawano, and P. Möller
We present a coupled quasiparticle random phase approximation and Hauser-Feshbach (QRPA+HF) model for calculating delayed particle emission. This approach uses microscopic nuclear structure information, which starts with Gamow-Teller strength distributions in the daughter nucleus and then follows th…
[Phys. Rev. C 94, 064317] Published Mon Dec 19, 2016
Multinucleon short-range correlation model for nuclear spectral functions: Theoretical framework
2016-12-19T10:00:00-05:00
Author(s): Oswaldo Artiles and Misak M. Sargsian
We develop a theoretical approach for nuclear spectral functions at high missing momenta and removal energies based on the multinucleon short-range correlation (SRC) model. The approach is based on the effective Feynman diagrammatic method which allows us to account for the relativistic effects impo…
[Phys. Rev. C 94, 064318] Published Mon Dec 19, 2016
Neutron-rich rare-isotope production from projectile fission of heavy nuclei near 20 MeV/nucleon beam energy
2016-12-19T10:00:00-05:00
Author(s): N. Vonta, G. A. Souliotis, W. Loveland, Y. K. Kwon, K. Tshoo, S. C. Jeong, M. Veselsky, A. Bonasera, and A. Botvina
We investigate the possibilities of producing neutron-rich nuclides in projectile fission of heavy beams in the energy range of 20 MeV/nucleon expected from low-energy facilities. We report our efforts to theoretically describe the reaction mechanism of projectile fission following a multinucleon tr…
[Phys. Rev. C 94, 064611] Published Mon Dec 19, 2016
Molecular dynamics approach to dissipative relativistic hydrodynamics: Propagation of fluctuations
2016-12-19T10:00:00-05:00
Author(s): Leila Shahsavar, Malihe Ghodrat, and Afshin Montakhab
Relativistic generalization of hydrodynamic theory has attracted much attention from a theoretical point of view. However, it has many important practical applications in high energy as well as astrophysical contexts. Despite various attempts to formulate relativistic hydrodynamics, no definitive co…
[Phys. Rev. C 94, 064905] Published Mon Dec 19, 2016
Multiplicity-dependent and nonbinomial efficiency corrections for particle number cumulants
2016-12-19T10:00:00-05:00
Author(s): Adam Bzdak, Romain Holzmann, and Volker Koch
In this article we extend previous work on efficiency corrections for cumulant measurements [Bzdak and Koch, Phys. Rev. C 86, 044904 (2012); Phys. Rev. C 91, 027901 (2015)]. We will discuss the limitations of the methods presented in these papers. Specifically we will consider multiplicity dependent…
[Phys. Rev. C 94, 064907] Published Mon Dec 19, 2016
Partial-wave analysis of nucleon-nucleon elastic scattering data
2016-12-19T10:00:00-05:00
Author(s): Ron L. Workman, William J. Briscoe, and Igor I. Strakovsky
Energy-dependent and single-energy fits to the existing nucleon-nucleon database have been updated to incorporate recent measurements. The fits cover a region from threshold to 3 GeV, in the laboratory kinetic energy, for proton-proton scattering, with an upper limit of 1.3 GeV for neutron-proton sc…
[Phys. Rev. C 94, 065203] Published Mon Dec 19, 2016
Experimental study of the astrophysically important ^{23} Na(α,p) ^{26} Mg and ^{23} Na(α,n) ^{26} Al reactions
2016-12-19T10:00:00-05:00
Author(s): M. L. Avila, K. E. Rehm, S. Almaraz-Calderon, A. D. Ayangeakaa, C. Dickerson, C. R. Hoffman, C. L. Jiang, B. P. Kay, J. Lai, O. Nusair, R. C. Pardo, D. Santiago-Gonzalez, R. Talwar, and C. Ugalde
The ^{23}Na(α,p)^{26}Mg and ^{23}Na(α,n)^{26}Al reactions are important for our understanding of the ^{26}Al abundance in massive stars. The aim of this work is to report on a direct and simultaneous measurement of these astrophysically important reactions using an active target system. The reaction…
[Phys. Rev. C 94, 065804] Published Mon Dec 19, 2016
Υ production in U + U collisions at sqrt[s_{NN} ] =193 GeV measured with the STAR experiment
2016-12-15T10:00:00-05:00
Author(s): L. Adamczyk
et al. (STAR Collaboration)
We present a measurement of the inclusive production of Υ mesons in U+U collisions at sqrt[s_{NN}]=193 GeV at midrapidity (|y|<1). Previous studies in central Au+Au collisions at sqrt[s_{NN}]=200 GeV show a suppression of Υ(1S+2S+3S) production relative to expectations from the Υ yield in p+p collisions scaled by the number of binary nucleon-nucleon collisions (N_{coll}), with an indication that the Υ(1S) state is also suppressed. The present measurement extends the number of participant nucleons in the collision (N_{part}) by 20% compared to Au+Au collisions, and allows us to study a system with higher energy density. We observe a suppression in both the Υ(1S+2S+3S) and Υ(1S) yields in central U+U data, which consolidates and extends the previously observed suppression trend in Au+Au collisions.
[Phys. Rev. C 94, 064904] Published Thu Dec 15, 2016
Measurement of radiative proton capture on ^{18} F and implications for oxygen-neon novae reexamined
2016-12-15T10:00:00-05:00
Author(s): C. Akers, A. M. Laird, B. R. Fulton, C. Ruiz, D. W. Bardayan, L. Buchmann, G. Christian, B. Davids, L. Erikson, J. Fallis, U. Hager, D. Hutcheon, L. Martin, A. St. J. Murphy, K. Nelson, D. Ottewell, A. Rojas, and A. Spyrou
Background: The rate of the ^{18}F(p,γ)^{19}Ne reaction affects the final abundance of the radioisotope ^{18}F ejected from novae. This nucleus is important as its abundance is thought to significantly influence the first-stage 511-keV and continuum γ-ray emission in the aftermath of novae. No succe…
[Phys. Rev. C 94, 065803] Published Thu Dec 15, 2016
Investigation of discrete states and quasidiscrete structures observed in ^{150} Sm and ^{152} Sm using the (p,tγ) reaction
2016-12-14T10:00:00-05:00
Author(s): P. Humby, A. Simon, C. W. Beausang, J. M. Allmond, J. T. Burke, R. J. Casperson, R. Chyzh, M. Dag, K. Gell, R. O. Hughes, J. Koglin, E. McCleskey, M. McCleskey, S. Ota, T. J. Ross, A. Saastamoinen, T. Tarlow, and G. Vyas
New levels and γ-ray transitions were identified in ^{150,152}Sm utilizing the (p,t) reaction and particle-γ coincidence data. A large, peak-like structure observed between 2.3–3.0 MeV in excitation energy in the triton energy spectra was also investigated. The orbital angular-momentum transfer was …
[Phys. Rev. C 94, 064314] Published Wed Dec 14, 2016
Predictions of nuclear charge radii
2016-12-14T10:00:00-05:00
Author(s): M. Bao, Y. Lu, Y. M. Zhao, and A. Arima
The nuclear charge radius is a fundamental property of an atomic nucleus. In this article we study the predictive power of empirical relations for experimental nuclear charge radii of neighboring nuclei and predict the unknown charge radii of 1085 nuclei based on the experimental CR2013 database wit…
[Phys. Rev. C 94, 064315] Published Wed Dec 14, 2016
Decay of the N=126, ^{213} Fr nucleus
2016-12-14T10:00:00-05:00
Author(s): Pragati, A. Y. Deo, Zs. Podolyák, P. M. Walker, A. Algora, B. Rubio, J. Agramunt, L. M. Fraile, N. Al-Dahan, N. Alkhomashi, J. A. Briz, M. E. Estevez Aguado, G. Farrelly, W. Gelletly, A. Herlert, U. Köster, and A. Maira
γ rays following the EC/β^{+} and α decay of the N = 126, ^{213}Fr nucleus have been observed at the CERN isotope separator on-line (ISOLDE) facility with the help of γ-ray and conversion-electron spectroscopy. These γ rays establish several hitherto unknown excited states in ^{213}Rn. Also, five ne…
[Phys. Rev. C 94, 064316] Published Wed Dec 14, 2016