Preview: Recent Articles in Phys. Rev. C
Recent Articles in Phys. Rev. C
Recent articles in Physical Review C
Published: 2017-03-22T13:58:28-04:00
Return of backbending in ^{169} Tm and the effect of the N=98 deformed shell gap
2017-03-22T10:00:00-04:00
Author(s): Md. A. Asgar, T. Roy, G. Mukherjee, A. Dhal, Soumik Bhattacharya, S. Bhattacharyya, C. Bhattacharya, S. Bhattacharya, A. Chaudhuri, K. Banerjee, S. Kundu, S. Manna, R. Pandey, J. K. Meena, R. Palit, S. Biswas, S. Saha, J. Sethi, P. Singh, and D. Choudhury
The high spin excited states of ^{169}Tm have been studied via the ^{169}Tm(^{32}S, ^{32}S^{′})^{169}Tm^{*} reaction at a beam energy of 164 MeV. The γ rays were detected using an array of 19 Compton-suppressed clover HPGe detectors. The band based on the [411]1/2^{+} Nilsson orbital has been extend…
[Phys. Rev. C 95, 031304(R)] Published Wed Mar 22, 2017
Spin-orbit splittings of neutron states in N=20 isotones from covariant density functionals and their extensions
2017-03-22T10:00:00-04:00
Author(s): Konstantinos Karakatsanis, G. A. Lalazissis, Peter Ring, and Elena Litvinova
Spin-orbit splitting is an essential ingredient for our understanding of the shell structure in nuclei. One of the most important advantages of relativistic mean-field (RMF) models in nuclear physics is the fact that the large spin-orbit (SO) potential emerges automatically from the inclusion of Lor…
[Phys. Rev. C 95, 034318] Published Wed Mar 22, 2017
Spin flip loss in magnetic confinement of ultracold neutrons for neutron lifetime experiments
2017-03-22T10:00:00-04:00
Author(s): A. Steyerl, K. K. H. Leung, C. Kaufman, G. Müller, and S. S. Malik
We analyze the spin flip loss for ultracold neutrons in magnetic bottles of the type used in experiments aiming at a precise measurement of the neutron lifetime, extending the one-dimensional field model used previously by Steyerl et al. [Phys. Rev. C 86, 065501 (2012)] to two dimensions for cylindr…
[Phys. Rev. C 95, 035502] Published Wed Mar 22, 2017
Evolution of collectivity in the N=100 isotones near ^{170} Yb
2017-03-21T10:00:00-04:00
Author(s): V. Karayonchev, J.-M. Régis, J. Jolie, A. Blazhev, R. Altenkirch, S. Ansari, M. Dannhoff, F. Diel, A. Esmaylzadeh, C. Fransen, R.-B. Gerst, K. Moschner, C. Müller-Gatermann, N. Saed-Samii, S. Stegemann, N. Warr, and K. O. Zell
An experiment using the electronic γ−γ fast-timing technique was performed to measure lifetimes of the yrast states in ^{170}Yb. The lifetime of the yrast 2^{+} state was determined using the slope method. The value of τ=2.33(3) ns is in good agreement with the lifetimes measured using other techniq…
[Phys. Rev. C 95, 034316] Published Tue Mar 21, 2017
General form of the boson-fermion interaction in the interacting boson-fermion model-2
2017-03-21T10:00:00-04:00
Author(s): F. A. Matus and J. Barea
The boson-fermion interaction in the interacting boson-fermion model-2 (IBFM-2) is derived in a systematic and general form from a quadrupole-quadrupole force using several nondegenerate levels. The boson-fermion quadrupole operator employed is obtained from the boson-fermion image of the one nucleo…
[Phys. Rev. C 95, 034317] Published Tue Mar 21, 2017
Publisher's Note: Beam-energy dependence and updated test of the Trojan-horse nucleus invariance via a measurement of the ^{2} H(d,p) ^{3} H reaction at low energies [Phys. Rev. C 95, 035804 (2017)]
2017-03-21T10:00:00-04:00
Author(s): Chengbo Li, Qungang Wen, A. Tumino, Yuanyong Fu, Jing Zhou, Shuhua Zhou, Qiuying Meng, C. Spitaleri, R. G. Pizzone, and L. Lamia
[Phys. Rev. C 95, 039905] Published Tue Mar 21, 2017
Elliptic flow as a probe for the ψ(2S) production mechanism in relativistic heavy ion collisions
2017-03-20T10:00:00-04:00
Author(s): Baoyi Chen
I discuss the elliptic flows of ψ(2S) with different production mechanisms in sqrt[s_{NN}]=2.76 TeV Pb-Pb collisions. If the final ψ(2S)s are mainly from the recombination of uncorrelated charm and anticharm quarks at T≈T_{c}, charm and anticharm quarks will carry large collective flows of the bulk …
[Phys. Rev. C 95, 034908] Published Mon Mar 20, 2017
Kondo effect of D [over ¯] _{s} and D [over ¯] _{s}^{*} mesons in nuclear matter
2017-03-20T10:00:00-04:00
Author(s): Shigehiro Yasui and Kazutaka Sudoh
We study the Kondo effect for D[over ¯]_{s} and D[over ¯]_{s}^{*} mesons as impurity particles in nuclear matter. The spin-exchange interaction between the D[over ¯]_{s} or D[over ¯]_{s}^{*} meson and the nucleon induces the enhancement of the effective coupling in the low-energy scattering in the i…
[Phys. Rev. C 95, 035204] Published Mon Mar 20, 2017
Euclidean bridge to the relativistic constituent quark model
2017-03-20T10:00:00-04:00
Author(s): T. J. Hobbs, Mary Alberg, and Gerald A. Miller
Background: Knowledge of nucleon structure is today ever more of a precision science, with heightened theoretical and experimental activity expected in coming years. At the same time, a persistent gap lingers between theoretical approaches grounded in Euclidean methods (e.g., lattice QCD, Dyson-Schw…
[Phys. Rev. C 95, 035205] Published Mon Mar 20, 2017
Improved empirical parameterization for projectile fragmentation cross sections
2017-03-17T10:00:00-04:00
Author(s): B. Mei
A new empirical parametrization is developed for calculating the fragment cross sections in projectile fragmentation reactions at high energies (>100 MeV/nucleon). The new parametrization, FRACS, consists of two main parts, i.e., the mass yield and the isobaric distribution, on the basis of previous …
[Phys. Rev. C 95, 034608] Published Fri Mar 17, 2017
Fusion and quasifission studies in reactions forming Rn via evaporation residue measurements
2017-03-17T10:00:00-04:00
Author(s): A. Shamlath, E. Prasad, N. Madhavan, P. V. Laveen, J. Gehlot, A. K. Nasirov, G. Giardina, G. Mandaglio, S. Nath, Tathagata Banerjee, A. M. Vinodkumar, M. Shareef, A. Jhingan, T. Varughese, DVGRKS Kumar, P. Sandya Devi, Khushboo, P. Jisha, Neeraj Kumar, M. M. Hosamani, and S. Kailas
Background: Formation of the compound nucleus (CN) is highly suppressed by quasifission in heavy-ion collisions involving massive nuclei. Though considerable progress has been made in the understanding of fusion-fission and quasifission, the exact dependence of fusion probability on various entrance…
[Phys. Rev. C 95, 034610] Published Fri Mar 17, 2017
α decay and spontaneous fission half-lives of nuclei around ^{270} Hs
2017-03-17T10:00:00-04:00
Author(s): C. I. Anghel and I. Silişteanu
α decay and spontaneous fission half-lives of 81 superheavy nuclei with Z=104–112 and N=158–166 have been calculated with simple formulas extracted from the systematics of measured and calculated half-lives. Half-life calculations are performed within the shell model and one-body rate theories for α…
[Phys. Rev. C 95, 034611] Published Fri Mar 17, 2017
β-delayed proton emission from ^{26} P and ^{27} S
2017-03-16T10:00:00-04:00
Author(s): Ł. Janiak, N. Sokołowska, A. A. Bezbakh, A. A. Ciemny, H. Czyrkowski, R. Dąbrowski, W. Dominik, A. S. Fomichev, M. S. Golovkov, A. V. Gorshkov, Z. Janas, G. Kamiński, A. G. Knyazev, S. A. Krupko, M. Kuich, C. Mazzocchi, M. Mentel, M. Pfützner, P. Pluciński, M. Pomorski, R. S. Slepniev, and B. Zalewski
Delayed emission of protons following β decay of neutron deficient nuclei ^{26}P and ^{27}S was investigated at the ACCULINNA separator in the Flerov Laboratory of Nuclear Reactions at Dubna. Ions of interest, identified in flight, were implanted into the active volume of the gaseous optical time pr…
[Phys. Rev. C 95, 034315] Published Thu Mar 16, 2017
Cluster structure of ^{17} O
2017-03-16T10:00:00-04:00
Author(s): S. Yu. Mezhevych, A. T. Rudchik, A. A. Rudchik, O. A. Ponkratenko, N. Keeley, K. W. Kemper, M. Mazzocco, K. Rusek, and S. B. Sakuta
The transfer reaction ^{13}C(^{11}B,^{7}Li)^{17}O leading to the ground and several excited states of ^{17}O was investigated at an incident boron beam energy of 45 MeV. The experimental data were analyzed by means of coupled-channel Born approximation calculations and ^{17}O=α+^{13}C spectroscopic …
[Phys. Rev. C 95, 034607] Published Thu Mar 16, 2017
Interplay of projectile breakup and target excitation in reactions induced by weakly bound nuclei
2017-03-16T10:00:00-04:00
Author(s): M. Gómez-Ramos and A. M. Moro
Background: Reactions involving weakly bound nuclei require formalisms able to deal with continuum states. The majority of these formalisms struggle to treat collective excitations of the systems involved. For continuum-discretized coupled channels (CDCC), extensions to include target excitation hav…
[Phys. Rev. C 95, 034609] Published Thu Mar 16, 2017
New K isomers in the neutron-rich N=100 isotones ^{162} Sm, ^{163} Eu, and ^{164} Gd
2017-03-15T10:00:00-04:00
Author(s): R. Yokoyama
et al.Very neutron-rich Z∼60 isotopes produced by in-flight fission of a 345 MeV/nucleon ^{238}U beam at the RI Beam Factory, RIKEN Nishina Center, have been studied by delayed γ-ray spectroscopy. New isomers were discovered in the neutron-rich N=100 isotones ^{162}Sm, ^{163}Eu, and ^{164}Gd. Half-lives, …
[Phys. Rev. C 95, 034313] Published Wed Mar 15, 2017
Multi-neutron emission of Cd isotopes
2017-03-15T10:00:00-04:00
Author(s): A. P. Severyukhin, N. N. Arsenyev, I. N. Borzov, and E. O. Sushenok
An influence of the phonon-phonon coupling (PPC) on the β-decay half-lives and multi-neutron emission probabilities is analyzed within the microscopic model based on the Skyrme interaction with tensor components included. The finite-rank separable approximation is used in order to handle large two-q…
[Phys. Rev. C 95, 034314] Published Wed Mar 15, 2017
2_{1}^{+} to 3_{1}^{+} γ width in ^{22} Na and second class currents
2017-03-15T10:00:00-04:00
Author(s): S. Triambak, L. Phuthu, A. García, G. C. Harper, J. N. Orce, D. A. Short, S. P. R. Steininger, A. Diaz Varela, R. Dunlop, D. S. Jamieson, W. A. Richter, G. C. Ball, P. E. Garrett, C. E. Svensson, and C. Wrede
Background: A previous measurement of the β−γ directional coefficient in ^{22}Naβ decay was used to extract recoil-order form factors. The data indicate the requirement of a significant induced-tensor matrix element for the decay. This conclusion largely relies on a standard-model-allowed weak magne…
[Phys. Rev. C 95, 035501] Published Wed Mar 15, 2017
Global Λ polarization in high energy collisions
2017-03-14T10:00:00-04:00
Author(s): Yilong Xie, Dujuan Wang, and László P. Csernai
With a Yang-Mills flux-tube initial state and a high-resolution (3+1)D particle-in-cell relativistic (PICR) hydrodynamics simulation, we calculate the Λ polarization for different energies. The origination of polarization in high energy collisions is discussed, and we find linear impact parameter de…
[Phys. Rev. C 95, 031901(R)] Published Tue Mar 14, 2017
Exact solution of the mean-field plus separable pairing model reexamined
2017-03-13T10:00:00-04:00
Author(s): Feng Pan, Dan Zhou, Lianrong Dai, and J. P. Draayer
Exact solution of the nuclear mean-field plus separable pairing model is reexamined. New auxiliary constraints for solving the Bethe ansatz equations of the model are proposed. By using these auxiliary constraints, the Bethe ansatz form of eigenvectors of the mean-field plus separable pairing Hamilt…
[Phys. Rev. C 95, 034308] Published Mon Mar 13, 2017
Beyond-mean-field study of the hyperon impurity effect in hypernuclei with shape coexistence
2017-03-13T10:00:00-04:00
Author(s): X. Y. Wu, H. Mei, J. M. Yao, and Xian-Rong Zhou
Background: The hyperon impurity effect in nuclei has been extensively studied in different mean-field models. Recently, there is a controversy about whether the Λ hyperon is more tightly bound in the normal deformed (ND) states than that in the superdeformed (SD) states.
[Phys. Rev. C 95, 034309] Published Mon Mar 13, 2017
Nuclear energy density functional and the nuclear α decay
2017-03-13T10:00:00-04:00
Author(s): Yeunhwan Lim and Yongseok Oh
The nuclear α decay of heavy nuclei is investigated based on the nuclear energy density functional, which leads to the α potential inside the parent nucleus in terms of the proton and neutron density profiles of the daughter nucleus. We use the Skyrme force model, Gogny force model, and relativistic…
[Phys. Rev. C 95, 034311] Published Mon Mar 13, 2017
Photonuclear reaction as a probe for α-clustering nuclei in the quasi-deuteron region
2017-03-13T10:00:00-04:00
Author(s): B. S. Huang (黄勃松), Y. G. Ma (马余刚), and W. B. He (何万兵)
Photon-nuclear reaction in a transport model frame, namely an extended quantum molecular dynamics model, has been realized at the photon energy of 70–140 MeV in the quasi-deuteron regime. For an important application, we pay a special focus on photonuclear reactions of ^{12}C(γ,np)^{10}B where ^{12}…
[Phys. Rev. C 95, 034606] Published Mon Mar 13, 2017
Proton radius from electron-proton scattering and chiral perturbation theory
2017-03-13T10:00:00-04:00
Author(s): Marko Horbatsch, Eric A. Hessels, and Antonio Pineda
We determine the root-mean-square proton charge radius, R_{p}, from a fit to low-Q^{2} electron-proton elastic-scattering cross-section data with the higher moments fixed (within uncertainties) to the values predicted by chiral perturbation theory. We obtain R_{p}=0.855(11) fm. This number falls bet…
[Phys. Rev. C 95, 035203] Published Mon Mar 13, 2017
Three-body model for the two-neutron emission of ^{16} Be
2017-03-10T10:00:00-05:00
Author(s): A. E. Lovell, F. M. Nunes, and I. J. Thompson
Background: While diproton emission was first theorized in 1960 and first measured in 2002, it was first observed only in 2012. The measurement of ^{14}Be in coincidence with two neutrons suggests that ^{16}Be does decay through the simultaneous emission of two strongly correlated neutrons.
[Phys. Rev. C 95, 034605] Published Fri Mar 10, 2017
Quasiparticle anisotropic hydrodynamics for central collisions
2017-03-10T10:00:00-05:00
Author(s): Mubarak Alqahtani, Mohammad Nopoush, and Michael Strickland
We use quasiparticle anisotropic hydrodynamics to study an azimuthally symmetric boost-invariant quark-gluon plasma including the effects of both shear and bulk viscosities. In quasiparticle anisotropic hydrodynamics, a single finite-temperature quasiparticle mass is introduced and fit to the lattic…
[Phys. Rev. C 95, 034906] Published Fri Mar 10, 2017
Exclusive η electroproduction at W>2 GeV with CLAS and transversity generalized parton distributions
2017-03-10T10:00:00-05:00
Author(s): I. Bedlinskiy
et al. (CLAS Collaboration)
The cross section of the exclusive η electroproduction reaction ep→e^{′}p^{′}η was measured at Jefferson Laboratory with a 5.75 GeV electron beam and the CLAS detector. Differential cross sections d^{4}σ/dtdQ^{2}dx_{B}dϕ_{η} and structure functions σ_{U}=σ_{T}+εσ_{L},σ_{TT}, and σ_{LT}, as functions…
[Phys. Rev. C 95, 035202] Published Fri Mar 10, 2017
Dynamical α-cluster model of ^{16} O
2017-03-09T10:00:00-05:00
Author(s): C. J. Halcrow, C. King, and N. S. Manton
We calculate the low-lying spectrum of the ^{16}O nucleus using an α-cluster model which includes the important tetrahedral and square configurations. Our approach is motivated by the dynamics of α-particle scattering in the Skyrme model. We are able to replicate the large energy splitting that is o…
[Phys. Rev. C 95, 031303(R)] Published Thu Mar 09, 2017
Two-nucleon transfer reactions as a test of quantum phase transitions in nuclei
2017-03-09T10:00:00-05:00
Author(s): Y. Zhang and F. Iachello
A quantal and a semiclassical analysis of two-nucleon transfer intensities is done within the framework of the interacting boson model. The expected features of these quantities for the quantum phase transition (QPT) between spherical, U(5), and axially deformed, SU(3), shapes are discussed. Experim…
[Phys. Rev. C 95, 034306] Published Thu Mar 09, 2017
Microscopic cluster model for the description of new experimental results on the ^{13} C( ^{18} O, ^{16} O) ^{15} C two-neutron transfer at 84 MeV incident energy
2017-03-09T10:00:00-05:00
Author(s): D. Carbone, J. L. Ferreira, F. Cappuzzello, J. Lubian, C. Agodi, M. Cavallaro, A. Foti, A. Gargano, S. M. Lenzi, R. Linares, and G. Santagati
The ^{13}C(^{18}O,^{16}O)^{15}C reaction is studied at 84 MeV incident energy. Excitation energy spectra and absolute cross-section angular distributions for the strongest transitions are measured with good energy and angular resolutions. Strong selectivity for two-neutron configurations in the stat…
[Phys. Rev. C 95, 034603] Published Thu Mar 09, 2017
Measurement of the stellar ^{58} Ni(n,γ) ^{59} Ni cross section with accelerator mass spectrometry
2017-03-09T10:00:00-05:00
Author(s): Peter Ludwig, Georg Rugel, Iris Dillmann, Thomas Faestermann, Leticia Fimiani, Karin Hain, Gunther Korschinek, Johannes Lachner, Mikhail Poutivtsev, Klaus Knie, Michael Heil, Franz Käppeler, and Anton Wallner
The ^{58}Ni(n,γ)^{59}Ni cross section was measured with a combination of the activation technique and accelerator mass spectrometry (AMS). The neutron activations were performed at the Karlsruhe 3.7 MV Van de Graaff accelerator using the quasistellar neutron spectrum at kT=25 keV produced by the ^{7…
[Phys. Rev. C 95, 035803] Published Thu Mar 09, 2017
Beam-energy dependence and updated test of the Trojan-horse nucleus invariance via a measurement of the ^{2} H(d,p) ^{3} H reaction at low energies
2017-03-09T10:00:00-05:00
Author(s): Chengbo Li, Qungang Wen, A. Tumino, Yuanyong Fu, Jing Zhou, Shuhua Zhou, Qiuying Meng, C. Spitaleri, R. G. Pizzone, and L. Lamia
The ^{2}H(d,p)^{3}H bare nucleus astrophysical S(E) factor has been measured indirectly at energies from about 500 keV down to several keV by means of the Trojan-horse method applied to the ^{2}H(^{6}Li,pt)^{4}He quasifree reaction induced at 11 MeV. The obtained results are compared with direct dat…
[Phys. Rev. C 95, 035804] Published Thu Mar 09, 2017
Quantifying statistical uncertainties in ab initio nuclear physics using Lagrange multipliers
2017-03-08T10:00:00-05:00
Author(s): B. D. Carlsson
Theoretical predictions need quantified uncertainties for a meaningful comparison to experimental results. This is an idea which presently permeates the field of theoretical nuclear physics. In light of the recent progress in estimating theoretical uncertainties in ab initio nuclear physics, I here …
[Phys. Rev. C 95, 034002] Published Wed Mar 08, 2017
Self-consistent calculation of the nuclear composition in hot and dense stellar matter
2017-03-08T10:00:00-05:00
Author(s): Shun Furusawa and Igor Mishustin
We investigate the mass fractions and in-medium properties of heavy nuclei in stellar matter at characteristic densities and temperatures for supernova (SN) explosions. The individual nuclei are described within the compressible liquid-drop model taking into account modifications of bulk, surface, a…
[Phys. Rev. C 95, 035802] Published Wed Mar 08, 2017
Very low-energy nucleon- ^{16} O coupled-channel scattering: Results with a phenomenological vibrational model
2017-03-07T10:00:00-05:00
Author(s): J. P. Svenne, L. Canton, K. Amos, P. R. Fraser, S. Karataglidis, G. Pisent, and D. van der Knijff
We employ a collective vibration coupled-channel model to describe the nucleon-^{16}O cluster systems, obtaining low-excitation spectra for ^{17}O and ^{17}F. Bound and resonance states of the compound systems have been deduced, showing good agreement with experimental spectra. Low-energy scattering…
[Phys. Rev. C 95, 034305] Published Tue Mar 07, 2017
Skyrme forces and decay of the _{104} ^{266} Rf ^{*} nucleus synthesized via different incoming channels
2017-03-07T10:00:00-05:00
Author(s): Niyti, Aman Deep, Rajesh Kharab, Sahila Chopra, and Raj K. Gupta
The excitation functions for the production of ^{262}Rf, ^{261}Rf, and ^{260}Rf isotopes via 4n-, 5n-, and 6n-decay channels from the ^{266}Rf^{*} compound nucleus are studied within the dynamical cluster-decay model (DCM), including deformations β_{2i} and so-called hot-optimum orientations θ_{i} w…
[Phys. Rev. C 95, 034602] Published Tue Mar 07, 2017
Dynamical formation of center domains in quark-gluon plasma
2017-03-07T10:00:00-05:00
Author(s): Jakapat Kannika, Christoph Herold, Ayut Limphirat, Chinorat Kobdaj, and Yupeng Yan
We study the formation of domain structures due to spontaneous breakdown of center symmetry at high temperatures in quenched QCD. We develop a phenomenological model for the explicit propagation of the Polyakov loop as the relevant order parameter of the deconfinement phase transition. The surface t…
[Phys. Rev. C 95, 034903] Published Tue Mar 07, 2017
Hybrid configuration mixing model for odd nuclei
2017-03-06T10:00:00-05:00
Author(s): G. Colò, P. F. Bortignon, and G. Bocchi
In this work, we introduce a new approach which is meant to be a first step towards complete self-consistent low-lying spectroscopy of odd nuclei. So far, we essentially limit ourselves to the description of a double-magic core plus an extra nucleon. The model does not contain any free adjustable pa…
[Phys. Rev. C 95, 034303] Published Mon Mar 06, 2017
Phenomenological consequences of enhanced bulk viscosity near the QCD critical point
2017-03-06T10:00:00-05:00
Author(s): Akihiko Monnai, Swagato Mukherjee, and Yi Yin
In the proximity of the QCD critical point the bulk viscosity of quark-gluon matter is expected to be proportional to nearly the third power of the critical correlation length, and become significantly enhanced. This work is the first attempt to study the phenomenological consequences of enhanced bu…
[Phys. Rev. C 95, 034902] Published Mon Mar 06, 2017
Characterization of the proposed 4−α cluster state candidate in ^{16} O
2017-03-03T10:00:00-05:00
Author(s): K. C. W. Li, R. Neveling, P. Adsley, P. Papka, F. D. Smit, J. W. Brümmer, C. Aa. Diget, M. Freer, M. N. Harakeh, Tz. Kokalova, F. Nemulodi, L. Pellegri, B. Rebeiro, J. A. Swartz, S. Triambak, J. J. van Zyl, and C. Wheldon
The ^{16}O(α,α^{′}) reaction was studied at θ_{lab}=0^{∘} at an incident energy of E_{lab}=200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton decay and α decay from the natural parity states were observed in a large-acceptance silicon strip detector array at backward angles. The co…
[Phys. Rev. C 95, 031302(R)] Published Fri Mar 03, 2017
How the Pauli exclusion principle affects fusion of atomic nuclei
2017-03-02T10:00:00-05:00
Author(s): C. Simenel, A. S. Umar, K. Godbey, M. Dasgupta, and D. J. Hinde
The Pauli exclusion principle induces a repulsion between composite systems of identical fermions such as colliding atomic nuclei. Our goal is to study how heavy-ion fusion is impacted by this “Pauli repulsion.” We propose a new microscopic approach, the density-constrained frozen Hartree-Fock metho…
[Phys. Rev. C 95, 031601(R)] Published Thu Mar 02, 2017
Signature of clustering in quantum many-body systems probed by the giant dipole resonance
2017-03-02T10:00:00-05:00
Author(s): Deepak Pandit, Debasish Mondal, Balaram Dey, Srijit Bhattacharya, S. Mukhopadhyay, Surajit Pal, A. De, and S. R. Banerjee
The present experimental study illustrates how large deformations attained by nuclei due to cluster formation are perceived through the giant dipole resonance (GDR) strength function. The high energy GDR γ rays have been measured from ^{32}S at different angular momenta (J) but similar temperatures …
[Phys. Rev. C 95, 034301] Published Thu Mar 02, 2017
Examination of the energy dependence of the fusion process
2017-03-02T10:00:00-05:00
Author(s): F. Torabi, O. N. Ghodsi, and M. R. Pahlavani
In this study, the role of bombarding energy in analyzing the interaction potentials and describing the densities of interacting nuclei during fusion is investigated. For this purpose, the fusion cross sections of the ^{40}Ca+^{48}Ca, ^{16}O+^{92}Zr, and ^{40}Ca+^{90}Zr systems are calculated by the…
[Phys. Rev. C 95, 034601] Published Thu Mar 02, 2017
Corrections to nucleon capture cross sections computed in truncated Hilbert spaces
2017-03-01T10:00:00-05:00
Author(s): B. Acharya, A. Ekström, D. Odell, T. Papenbrock, and L. Platter
Nucleon capture cross sections enter various astrophysical processes. The measurement of proton capture on nuclei at astrophysically relevant low energies is a challenge, and theoretical computations in this long-wavelength regime are sensitive to the long-distance asymptotics of the wave functions.…
[Phys. Rev. C 95, 031301(R)] Published Wed Mar 01, 2017
Hydrodynamic predictions for mixed harmonic correlations in 200 GeV Au+Au collisions
2017-03-01T10:00:00-05:00
Author(s): Fernando G. Gardim, Frederique Grassi, Matthew Luzum, and Jacquelyn Noronha-Hostler
Recent measurements of Pb+Pb collisions at the CERN LHC have provided correlations between different characteristics of the flow of matter at such high energies. An analysis with a hydrodynamic model of these event-by-event measurements of correlated particle distributions leads to predictions for similar measurements that could be carried out in Au+Au collisions at a lower energy at BNL RHIC. The combined results might help pin down the initial states in high-energy heavy-ion collisions as well as the temperature dependence of transport coefficients.
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[Phys. Rev. C 95, 034901] Published Wed Mar 01, 2017
Spectrum-shape method and the next-to-leading-order terms of the β-decay shape factor
2017-02-28T10:00:00-05:00
Author(s): M. Haaranen, J. Kotila, and J. Suhonen
Effective values of the axial-vector coupling constant g_{A} have lately attracted much attention due to the prominent role of g_{A} in determining the half-lives of double β decays, in particular their neutrinoless mode. The half-life method, i.e., comparing the calculated half-lives to the corresp…
[Phys. Rev. C 95, 024327] Published Tue Feb 28, 2017
γ-ray spectroscopy of low-lying excited states and shape competition in ^{194} Os
2017-02-28T10:00:00-05:00
Author(s): T. Daniel, S. Kisyov, P. H. Regan, N. Marginean, Zs. Podolyák, R. Marginean, K. Nomura, M. Rudigier, R. Mihai, V. Werner, R. J. Carroll, L. A. Gurgi, A. Oprea, T. Berry, A. Serban, C. R. Nita, C. Sotty, R. Suvaila, A. Turturica, C. Costache, L. Stan, A. Olacel, M. Boromiza, and S. Toma
The properties of excited states in the neutron-rich nucleus ^{194}Os have been investigated using the ^{192}Os(^{18}O,^{16}O)^{194}Os reaction with an 80 MeV beam provided by the IFIN-HH Laboratory, Bucharest. Discrete γ-ray decays from excited states have been measured using the hybrid HPGe-LaBr_{…
[Phys. Rev. C 95, 024328] Published Tue Feb 28, 2017
Lifetime measurements in ^{162} Dy
2017-02-28T10:00:00-05:00
Author(s): A. Aprahamian, S. R. Lesher, C. Casarella, H. G. Börner, and M. Jentschel
Background: The nature of oscillations or excitations around the equilibrium deformed nuclear shape remains an open question in nuclear structure. The ^{162}Dy nucleus is one of the most extensively studied nuclei with the (n,γ), (n,e^{−}), (α,2n) reactions and most recently the (p,t) pickup reactio…
[Phys. Rev. C 95, 024329] Published Tue Feb 28, 2017
Measurements of neutron capture cross sections on ^{70} Zn at 0.96 and 1.69 MeV
2017-02-28T10:00:00-05:00
Author(s): L. R. M. Punte, B. Lalremruata, N. Otuka, S. V. Suryanarayana, Y. Iwamoto, Rebecca Pachuau, B. Satheesh, H. H. Thanga, L. S. Danu, V. V. Desai, L. R. Hlondo, S. Kailas, S. Ganesan, B. K. Nayak, and A. Saxena
The cross sections of the ^{70}Zn(n,γ)^{71}Zn^{m}(T_{1/2}=3.96±0.05−h) reaction have been measured relative to the ^{197}Au(n,γ)^{198}Au cross sections at 0.96 and 1.69 MeV using a ^{7}Li(p,n)^{7}Be neutron source and activation technique. The cross section of this reaction has been measured for the…
[Phys. Rev. C 95, 024619] Published Tue Feb 28, 2017
Investigation of single- and double-Λ hypernuclei using a beyond-mean-field approach
2017-02-27T10:00:00-05:00
Author(s): Ji-Wei Cui (崔继伟), Xian-Rong Zhou (周先荣), Li-Xin Guo (郭立新), and Hans-Josef Schulze
A beyond-mean-field approach consisting of angular momentum projection techniques and generator coordinate method based on Skyrme–Hartree-Fock calculations is employed to investigate single- and double-Λ hypernuclear systems. The density-dependent NΛ interactions derived from the Nijmegen soft-core …
[Phys. Rev. C 95, 024323] Published Mon Feb 27, 2017
Solution of a pairing problem in the continuum
2017-02-27T10:00:00-05:00
Author(s): A. Mercenne, N. Michel, J. Dukelsky, and M. Płoszajczak
We present a generalized Richardson solution for fermions interacting with the pairing interaction in both discrete and continuum parts of the single-particle (s.p.) spectrum. The pairing Hamiltonian is based on the rational Gaudin model which is formulated in the Berggren ensemble. We show that sol…
[Phys. Rev. C 95, 024324] Published Mon Feb 27, 2017
Isospin mixing of 2^{+} states in ^{14} N
2017-02-27T10:00:00-05:00
Author(s): H. T. Fortune
I have investigated the possibility that the near vanishing of the proton strength of the 9.17-MeV state in ^{14}N could be due to isospin mixing. If the two levels involved are at 9.17 and 8.98 MeV, the mixing intensity is 0.41(9) with a T-mixing matrix element of 94(10) keV. Some consequences of s…
[Phys. Rev. C 95, 024325] Published Mon Feb 27, 2017
Nonadiabatic quasiparticle approach for rotation-particle coupling in triaxial odd-A nuclei
2017-02-27T10:00:00-05:00
Author(s): Swati Modi, M. Patial, P. Arumugam, E. Maglione, and L. S. Ferreira
We discuss the formulation of a nonadiabatic approach to study the rotational states in triaxially deformed odd-A nuclei. The rotation-particle coupling is treated microscopically by coupling the triaxial rotor states of the even-even core with the states of the valence particle in order to obtain t…
[Phys. Rev. C 95, 024326] Published Mon Feb 27, 2017
Nuclear shape evolution based on microscopic level densities
2017-02-27T10:00:00-05:00
Author(s): D. E. Ward, B. G. Carlsson, T. Døssing, P. Möller, J. Randrup, and S. Åberg
The authors treat the nuclear shape evolution as a random walk on a multidimensional potential-energy surface using shape-dependent microscopic level densities. The resulting fission-fragment mass distributions agree remarkably well with data, and the gradual disappearance of pairing and shell effects with increasing energy is accounted for without additional parameters.
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[Phys. Rev. C 95, 024618] Published Mon Feb 27, 2017
Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS
2017-02-24T10:00:00-05:00
Author(s): M. Mayer
et al. (CLAS Collaboration)
Background: The deuteron plays a pivotal role in nuclear and hadronic physics, as both the simplest bound multinucleon system and as an effective neutron target. Quasielastic electron scattering on the deuteron is a benchmark reaction to test our understanding of deuteron structure and the propertie…
[Phys. Rev. C 95, 024005] Published Fri Feb 24, 2017
Low energy magnetic radiation enhancement in the f_{7/2} shell
2017-02-24T10:00:00-05:00
Author(s): S. Karampagia, B. A. Brown, and V. Zelevinsky
Studies of the γ-ray strength functions can reveal useful information concerning underlying nuclear structure. Accumulated experimental data on the strength functions show an enhancement in the low γ energy region. We have calculated the M1 strength functions for the ^{49,50}Cr and ^{48}V nuclei in …
[Phys. Rev. C 95, 024322] Published Fri Feb 24, 2017
Constraining color flavor locked strange stars in the gravitational wave era
2017-02-24T10:00:00-05:00
Author(s): C. Vásquez Flores and G. Lugones
We perform a detailed analysis of the fundamental mode of nonradial pulsations of color flavor locked strange stars. Solving the general relativistic equations for nonradial pulsations for an equation of state derived within the MIT bag model, we calculate the frequency and the gravitational damping…
[Phys. Rev. C 95, 025808] Published Fri Feb 24, 2017
Dependence of weak interaction rates on the nuclear composition during stellar core collapse
2017-02-24T10:00:00-05:00
Author(s): Shun Furusawa, Hiroki Nagakura, Kohsuke Sumiyoshi, Chinami Kato, and Shoichi Yamada
We investigate the influences of the nuclear composition on the weak interaction rates of heavy nuclei during the core collapse of massive stars. The nuclear abundances in nuclear statistical equilibrium (NSE) are calculated by some equation of state (EOS) models including in-medium effects on nucle…
[Phys. Rev. C 95, 025809] Published Fri Feb 24, 2017
Extraction of parameters from final state interactions
2017-02-23T10:00:00-05:00
Author(s): G. Fäldt and C. Wilkin
It is argued that final state enhancements in production reactions at large momentum transfers, such as pp→K^{+}Λp, are primarily sensitive to the position of a virtual bound state pole in the Λp system rather than the Λp scattering length and effective range. These arguments are supported by a stud…
[Phys. Rev. C 95, 024004] Published Thu Feb 23, 2017
Legendre analysis of differential distributions in hadronic reactions
2017-02-23T10:00:00-05:00
Author(s): Yakov I. Azimov, Igor I. Strakovsky, William J. Briscoe, and Ron L. Workman
Modern experimental facilities have provided a tremendous volume of reaction data, often with wide energy and angular coverage, and with increasing precision. For reactions with two hadrons in the final state, these data are often presented as multiple sets of panels, with angular distributions at n…
[Phys. Rev. C 95, 025205] Published Thu Feb 23, 2017
Erratum: High-spin states in ^{136} La and possible structure change in the N=79 region [Phys. Rev. C 91, 054305 (2015)]
2017-02-23T10:00:00-05:00
Author(s): H. Nishibata, R. Leguillon, A. Odahara, T. Shimoda, C. M. Petrache, Y. Ito, J. Takatsu, K. Tajiri, N. Hamatani, R. Yokoyama, E. Ideguchi, H. Watanabe, Y. Wakabayashi, K. Yoshinaga, T. Suzuki, S. Nishimura, D. Beaumel, G. Lehaut, D. Guinet, P. Desesquelles, D. Curien, K. Higashiyama, and N. Yoshinaga
[Phys. Rev. C 95, 029902] Published Thu Feb 23, 2017
Penning-trap-assisted study of excitations in ^{88} Br populated in β decay of ^{88} Se
2017-02-22T10:00:00-05:00
Author(s): M. Czerwiński, K. Sieja, T. Rząca-Urban, W. Urban, A. Płochocki, J. Kurpeta, J. Wiśniewski, H. Penttilä, A. Jokinen, S. Rinta-Antila, L. Canete, T. Eronen, J. Hakala, A. Kankainen, V. S. Kolhinen, J. Koponen, I. D. Moore, I. Pohjalainen, J. Reinikainen, V. Simutkin, A. Voss, I. Murray, and C. Nobs
Excited levels of ^{88}Br populated in the β decay of ^{88}Se have been studied by means of βγ and γγ spectroscopy methods. Neutron-rich parent ^{88}Se nuclei were produced with proton-induced fission of ^{238}U using the Ion Guide Isotope Separator On-Line (IGISOL) method and separated from contami…
[Phys. Rev. C 95, 024321] Published Wed Feb 22, 2017
Production of neutron-rich isotopes around N=126 in multinucleon transfer reactions
2017-02-22T10:00:00-05:00
Author(s): Zhao-Qing Feng
The multinucleon transfer reaction has been investigated within the dinuclear system model. The nucleon transfer is coupled to the dissipation of relative motion energy and angular momentum by solving a set of microscopically derived master equations. A barrier distribution approach is implemented i…
[Phys. Rev. C 95, 024615] Published Wed Feb 22, 2017
Internal and external radiative widths in the combined R-matrix and potential-model formalism
2017-02-22T10:00:00-05:00
Author(s): A. M. Mukhamedzhanov, Shubhchintak, C. A. Bertulani, and T. V. Nhan Hao
By using the R-matrix approach we calculate the radiative width for a resonance decaying to a bound state through electric-dipole E1 transitions. The total radiative width is determined by the interference of the nuclear internal and external radiative width amplitudes. For a given channel radius th…
[Phys. Rev. C 95, 024616] Published Wed Feb 22, 2017
Decay mechanism and lifetime of ^{67} Kr
2017-02-21T10:00:00-05:00
Author(s): L. V. Grigorenko, T. A. Golubkova, J. S. Vaagen, and M. V. Zhukov
The lifetime of the recently discovered 2p emitter ^{67}Kr was found to be considerably below the lower limit predicted theoretically. This communication addresses this issue. Different separation energy systematics are analyzed and different mechanisms for 2p emission are evaluated. We find that th…
[Phys. Rev. C 95, 021601(R)] Published Tue Feb 21, 2017
Total absorption γ-ray spectroscopy of the β-delayed neutron emitters ^{87} Br, ^{88} Br, and ^{94} Rb
2017-02-21T10:00:00-05:00
Author(s): E. Valencia
et al.We investigate the decay of ^{87,88}Br and ^{94}Rb using total absorption γ-ray spectroscopy. These important fission products are β-delayed neutron emitters. Our data show considerable βγ intensity, so far unobserved in high-resolution γ-ray spectroscopy, from states at high excitation energy. We a…
[Phys. Rev. C 95, 024320] Published Tue Feb 21, 2017
Uncertainty quantification for optical model parameters
2017-02-21T10:00:00-05:00
Author(s): A. E. Lovell, F. M. Nunes, J. Sarich, and S. M. Wild
Background: Although uncertainty quantification has been making its way into nuclear theory, these methods have yet to be explored in the context of reaction theory. For example, it is well known that different parameterizations of the optical potential can result in different cross sections, but th…
[Phys. Rev. C 95, 024611] Published Tue Feb 21, 2017
Medium effect on the nuclear modification factor of protons and pions in intermediate-energy heavy ion collisions
2017-02-21T10:00:00-05:00
Author(s): M. Lv (吕明), Y. G. Ma (马余刚), J. H. Chen (陈金辉), D. Q. Fang (方德清), and G. Q. Zhang (张国强)
Nuclear modification factors R_{cp} of protons and pions are investigated by simulating Au+Au collisions from 0.8A to 1.8A GeV in a framework of an isospin-dependent quantum molecular dynamics (IQMD) model. The R_{cp} of protons rise with an increase in the transverse particle momentum p_{T} at diff…
[Phys. Rev. C 95, 024614] Published Tue Feb 21, 2017
Dynamical scheme for hadronization with first-order phase transition
2017-02-21T10:00:00-05:00
Author(s): Bohao Feng, Zhe Xu, and Carsten Greiner
We present a dynamical scheme for hadronization with first-order confinement phase transition. The thermodynamical conditions of phase equilibrium, the fluid velocity profile, and the dissipative effect determine the macroscopic changes of the parton volume and the corresponding hadron volume during…
[Phys. Rev. C 95, 024907] Published Tue Feb 21, 2017
Lower limit on the heat capacity of the neutron star core
2017-02-21T10:00:00-05:00
Author(s): Andrew Cumming, Edward F. Brown, Farrukh J. Fattoyev, C. J. Horowitz, Dany Page, and Sanjay Reddy
Using the observation of four transiently-accreting neutron stars, the authors provide (under simple assumptions) a lower limit for the star core heat capacity. The limit rules out a large fraction of the core being made up of a quark color-flavor-locked phase. Future observations during cooling periods between accretion outbursts will further constrain the heat capacity and neutrino cooling luminosity of the core.
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[Phys. Rev. C 95, 025806] Published Tue Feb 21, 2017
Assessing the near threshold cross section of the ^{17} O(n,α) ^{14} C reaction by means of the Trojan horse method
2017-02-21T10:00:00-05:00
Author(s): G. L. Guardo, C. Spitaleri, L. Lamia, M. Gulino, M. La Cognata, X. Tang, R. deBoer, X. Fang, V. Goldberg, J. Mrazek, A. Mukhamedzhanov, M. Notani, R. G. Pizzone, G. G. Rapisarda, M. L. Sergi, and M. Wiescher
The study of the ^{17}O(n,α)^{14}C reaction has been performed by means of the Trojan horse method (THM) applied to the quasifree ^{2}H(^{17}O,α^{14}C)^{1}H reaction induced at a beam energy of 43.5 MeV. The THM allowed us to study the 8121-keV ^{18}O^{*} resonant level, for which the previous THM i…
[Phys. Rev. C 95, 025807] Published Tue Feb 21, 2017
Exotic neutron-rich medium-mass nuclei with realistic nuclear forces
2017-02-17T10:00:00-05:00
Author(s): Naofumi Tsunoda, Takaharu Otsuka, Noritaka Shimizu, Morten Hjorth-Jensen, Kazuo Takayanagi, and Toshio Suzuki
We present the first application of the newly developed extended Kuo-Krenciglowa (EKK) theory of the effective nucleon-nucleon interaction to shell-model studies of exotic nuclei, including those where conventional approaches with fitted interactions encounter difficulties. This EKK theory enables u…
[Phys. Rev. C 95, 021304(R)] Published Fri Feb 17, 2017
Hard photodisintegration of ^{3} He into a pd pair
2017-02-17T10:00:00-05:00
Author(s): Dhiraj Maheswari and Misak M. Sargsian
The recent measurements of high energy photodisintegration of a ^{3}He nucleus to a pd pair at 90^{∘} center of mass demonstrated an energy scaling consistent with the quark counting rule with an unprecedentedly large exponent of s^{−17}. To understand the underlying mechanism of this process, we ex…
[Phys. Rev. C 95, 024609] Published Fri Feb 17, 2017
Measurement of the ^{242m} Am neutron-induced reaction cross sections
2017-02-17T10:00:00-05:00
Author(s): M. Q. Buckner, C. Y. Wu, R. A. Henderson, B. Bucher, N. Wimer, A. Chyzh, T. A. Bredeweg, B. Baramsai, A. Couture, M. Jandel, S. Mosby, and J. L. Ullmann (DANCE Collaboration)
The neutron-induced reaction cross sections of ^{242m}Am were measured at the Los Alamos Neutron Science Center using the Detector for Advanced Neutron-Capture Experiments array along with a compact parallel-plate avalanche counter for fission-fragment detection. A new neutron-capture cross section …
[Phys. Rev. C 95, 024610] Published Fri Feb 17, 2017
α clustering in ^{28} Si probed through the identification of high-lying 0^{+} states
2017-02-16T10:00:00-05:00
Author(s): P. Adsley, D. G. Jenkins, J. Cseh, S. S. Dimitriova, J. W. Brümmer, K. C. W. Li, D. J. Marín-Lámbarri, K. Lukyanov, N. Y. Kheswa, R. Neveling, P. Papka, L. Pellegri, V. Pesudo, L. C. Pool, G. Riczu, F. D. Smit, J. J. van Zyl, and E. Zemlyanaya
Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as ^{12}C and ^{16}O. Such structures are associated with strong deformation corresponding to superdeformed or even hyp…
[Phys. Rev. C 95, 024319] Published Thu Feb 16, 2017
Half-life of the 15/2^{+} state of ^{135} I: A test of E2 seniority relations
2017-02-15T10:00:00-05:00
Author(s): P. Spagnoletti
et al.The half-life of the 15/2_{1}^{+} state of the 3-valence-proton nucleus ^{135}I has been measured to be 1.74(8) ns using the EXILL-FATIMA mixed array of Ge and LaBr_{3} detectors. The nuclei were produced following the cold neutron-induced fission of a ^{235}U target at the PF1B beam line of the Ins…
[Phys. Rev. C 95, 021302(R)] Published Wed Feb 15, 2017
Selective decay from a candidate of the σ-bond linear-chain state in ^{14} C
2017-02-15T10:00:00-05:00
Author(s): J. Li
et al.A cluster-transfer experiment ^{9}Be(^{9}Be,^{14}C^{*}→α+^{10}Be)^{4}He was carried out using an incident beam energy of 45 MeV. This reaction channel has a large Q value that favors populating the high-lying states in ^{14}C and separating various reaction channels. A number of resonant states are …
[Phys. Rev. C 95, 021303(R)] Published Wed Feb 15, 2017