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Nuclear Theory·nucl-th

Wednesday·September 7, 2016

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    Isospin dependence of nucleon effective masses in neutron-rich matter

    Bao-An Li · Bao-Jun Cai · Lie-Wen Chen · Xiao-Hua Li

    In this talk, we first briefly review the isospin dependence of the total nucleon effective mass inferred from analyzing nucleon-nucleus scattering data within an isospin dependent non-relativistic optical potential model, and the isospin dependence of the nucleon E-mass obtained from applying the Migdal-Luttinger theorem to a phenomenological single-nucleon momentum distribution in nuclei constrained by recent electron-nucleus scattering experiments. Combining information about the isospin dependence of both the nucleon total effective mass and E-mass, we then infer the isospin dependence of nucleon k-mass using the well-known relation . Implications of the results on the nucleon mean free path (MFP) in neutron-rich matter are discussed.

    nucl-thastro-ph.SRnucl-exNucl.Sci.Tech.(2016)·10 citations
  2. 02

    3-cluster structure and monopole transition in C and C

    Yuta Yoshida · Yoshiko Kanada-En'yo

    3-cluster structures and monopole transitions of states in C and C were investigated with - and Be+-cluster models. A gas-like state and a bending-chain state were obtained in the and states of C, respectively. In C, a linear-chain 3 structure is found in the state near the Be+ threshold, but a cluster gas-like state does not appear because valence neutrons attract clusters and suppress spatial development of 3 clustering. It was found that the linear-chain state in C is stabilized against the bending and escaping modes by valence neutrons. The monopole transition strengths in C are enhanced by -cluster developing, whereas, those in C are not enhanced so much because of the tight binding of clusters by valence neutrons.

    nucl-th1 citation
  3. 03

    Baryon Number Fluctuations in Quasi-particle Model

    Ameng Zhao🇨🇳 · Xiaofeng Luo🇨🇳 · Hongshi Zong🇨🇳

    Baryon number fluctuations are sensitive to the QCD phase transition and QCD critical point. According to the Feynman rules of finite-temperature field theory, we calculated various order moments and cumulants of the baryon number distributions in the quasi-particle model of quark gluon plasma. Furthermore, we compared our results with the experimental data measured by the STAR experiment at RHIC. It is found that the experimental data can be well described by the model for the colliding energies above 30 GeV and show large discrepancies at low energies. It can put new constraint on qQGP model and also provide a baseline for the QCD critical point search in heavy-ion collisions at low energies.

    nucl-thhep-exhep-phnucl-exEPJC(2017)·6 citations
  4. 04

    Microscopic phase-space exploration modeling of Fm spontaneous fission

    Yusuke Tanimura🇫🇷 · Denis Lacroix🇫🇷 · Sakir Ayik🇺🇸

    We show that the total kinetic energy (TKE) of nuclei after the spontaneous fission of Fm can be well reproduced using simple assumptions on the quantum collective phase-space explored by the nucleus after passing the fission barrier. Assuming energy conservation and phase-space exploration according to the stochastic mean-field approach, a set of initial densities is generated. Each density is then evolved in time using the nuclear time-dependent density-functional theory. This approach goes beyond mean-field by allowing spontaneous symmetry breaking as well as a wider dynamical phase-space exploration leading to larger fluctuations in collective space. The total kinetic energy and mass distributions are calculated. New information on the fission process: fluctuations in scission time, strong correlation between TKE and collective deformation of daughter nuclei as well as pre- and post-scission particle emission, are obtained.

    nucl-thnucl-exPRL(2017)·102 citations

Affiliations

first authorsco-authorsvia INSPIRE