Nuclear-plus-interference-scattering effect on the energy deposition of multi-MeV protons in a dense Be plasma
Nuclear-plus-interference-scattering effect on the energy deposition of multi-MeV protons in a dense Be plasma
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核加干扰散射效应对高密度 Be 等离子体中多 MeV 质子能量沉积的影响。
DOI：
10.1103/physreve.94.033205
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发表时间：
2016
影响因子：
2.4
通讯作者：
Zhang Ping
中科院分区：
文献类型：
--
作者：
Wang Zhigang;Fu Zhenguo;He Bin;Hu Zehua;Zhang Ping
利用考虑干扰散射项的广义布朗-普雷斯顿-单态（BPS）模型，从理论上研究了核加干涉散射（NIS）对多mev质子热致密铍等离子体阻挡能力的影响。详细推导了NIS项的解析公式。利用该公式，对等离子体温度和密度对NIS效应的依赖关系进行了数值研究，结果表明，随着等离子体温度和密度的增加，NIS效应变得越来越重要。与质子穿过氘-氚等离子体的情况不同，对于Be等离子体，当质子能量接近E_{p}=7MeV时，在NIS项中观察到一个显著的振荡谷结构。此外，当考虑NIS项时，穿透距离显着减小。
The nuclear plus interference scattering (NIS) effect on the stopping power of hot dense beryllium (Be) plasma for multi-MeV protons is theoretically investigated by using the generalized Brown-Preston-Singleton (BPS) model, in which a NIS term is taken into account. The analytical formula of the NIS term is detailedly derived. By using this formula, the density and temperature dependence of the NIS effect is numerically studied, and the results show that the NIS effect becomes more and more important with increasing the plasma temperature or density. Different from the cases of protons traveling through the deuterium-tritium plasmas, for a Be plasma, a prominent oscillation valley structure is observed in the NIS term when the proton's energy is close to E_{p}=7MeV. Furthermore, the penetration distance is remarkably reduced when the NIS term is considered.