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首页> 外文期刊>Physical review, C >New probe to study the symmetry energy at low nuclear density with the deuteron breakup reaction
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New probe to study the symmetry energy at low nuclear density with the deuteron breakup reaction

机译：新探头，以氘代分发反应研究低核密度的对称能量

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摘要

The reactions of nucleons and polarized deuterons scattered off a heavy target nucleus at large impact parameter with intermediate energies have been investigated by using the improved quantum molecular dynamics model. It is found that, due to the opposite effects of isovector potential on protons and neutrons, there is a significant difference between the angle distributions of elastically scattered protons and neutrons. To overcome the lack of a monochromatic neutron beam, the reaction of polarized deuterons peripherally scattered off a heavy target nucleus is used to replace the reaction of individual protons and neutrons scattered off a heavy target nucleus to study the isospin effect. It is found that the distributions of the scattering angle of the proton and the neutron originating from the elastic breakup of the deuteron are very similar to the results of the individual proton- and neutron-induced reactions. A new probe more effective and more clean, namely the difference between the elastic scattering angle of the proton and that of the neutron originating from the breakup of the polarized deuteron, is promoted to constrain the symmetry energy at subsaturation density.
机译：通过使用改进的量子分子动力学模型研究了在大冲击参数下散射散射重靶核的核聚体和偏振氘的反应。结果发现，由于缺口电位对质子和中子的效果相反，弹性散射的质子和中子的角度分布之间存在显着差异。为了克服缺乏单色中子束，偏离偏离重靶核的偏振氘的反应用于取代各自的质子和中子散落的反应散布重靶核来研究异源孔效应。发现质子的散射角和源自氘的弹性分裂的中子的分布与各种质子和中子诱导的反应的结果非常相似。促进了新的探针更有效和更清洁，即质子的弹性散射角与源自偏振氘的分解的中子之间的差异，以限制余下密度的对称能量。

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