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首页> 外文期刊>Physical Review C >Interplay of short-range correlations and nuclear symmetry energy in hard- photon production from heavy-ion reactions at Fermi energies
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Interplay of short-range correlations and nuclear symmetry energy in hard- photon production from heavy-ion reactions at Fermi energies

机译：在Fermi Energies的重离子反应中，短距离相关性和核对称能量的相互作用。

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摘要

Within an isospin- and momentum-dependent transport model for nuclear reactions at intermediate energies, we investigate the interplay of the nucleon-nucleon short-range correlations (SRCs) and nuclear symmetry energy E_(sym)(ρ) on hard-photon spectra in collisions of several Ca isotopes on 112Sn and 124Sn targets at a beam energy of 45 MeVucleon. It is found that over the whole spectra of hard photons studied, effects of the SRCs overwhelm those owing to the E_(sym)(ρ). The energetic photons come mostly from the high-momentum tails (HMTs) of single-nucleon momentum distributions in the target and projectile. Within the neutron-proton dominance model of SRCs based on the consideration that the tensor force acts mostly in the isosinglet and spin-triplet nucleon-nucleon interaction channel, there are equal numbers of neutrons and protons, thus a zero isospin asymmetry in the HMTs. Therefore, experimental measurements of the energetic photons from heavy-ion collisions at Fermi energies have the great potential to help us better understand the nature of SRCs without any appreciable influence by the uncertain E_(sym)(ρ). These measurements will be complementary to but also have some advantages over the ongoing and planned experiments using hadronic messengers from reactions induced by high-energy electrons or protons. Because the underlying physics of SRCs and E_ (sym)(ρ) are closely correlated, a better understanding of the SRCs will, in turn, help constrain the nuclear symmetry energy more precisely in a broad density range.
机译：在中间能量的核反应依赖于依赖于核反应的核心和动量依赖的运输模型中，我们研究了核仁核聚核分子相关（SRC）和核对称能量E_（SYM）（ρ）对硬质光谱谱的相互作用在45meV /核的光束能量下112Sn和124Sn靶的几种Ca同位素的碰撞。结果发现，在研究的硬质的整个光谱上，SRC的效果压倒了由于E_（SYS）（ρ）。精力充沛的光子主要来自目标和射弹的单核动量分布的高动量尾部（HMT）。在SRC的中子质子优势模型中，基于张量力主要在异料片和旋转三重核聚核核核相互作用通道中作用，存在相同数量的中子和质子，因此HMTS中的零旋流不对称。因此，Fermi Energies的重离子碰撞中的能量光子的实验测量有很大的潜力，可以帮助我们更好地了解SRC的性质而不通过不确定的E_（SYM）（ρ）的任何明显的影响。这些测量将互补，但也可以使用高能电子或质子诱导的反应的持续和计划实验与正在进行的和计划的实验中具有一些优点。因为SRCS和E_（SYM）（ρ）的基础物理密切相关，所以更好地了解SRC将反过来有助于更精确地在宽密度范围内更精确地限制核对称能量。

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  • 来源
    《Physical Review C》 |2017年第2017期|064614.1-064614.8|共8页
  • 作者

    Gao-Chan Yong; Bao-An Li;

  • 作者单位

    Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China;

    Department of Physics and Astronomy Texas A&M University-Commerce Commerce Texas 75429-3011 USA;

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