Neutron-proton asymmetry dependence of nuclear temperature with intermediate mass fragments
Neutron-proton asymmetry dependence of nuclear temperature with intermediate mass fragments
复制标题
中等质量碎片核温度的中子-质子不对称依赖性
DOI：
10.1103/physrevc.100.064601
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发表时间：
2019
影响因子：
3.1
通讯作者：
Natowitz J. B.
中科院分区：
文献类型：
--
作者：
Liu X.;Zheng H.;Wada R.;Lin W.;Huang M.;Ren P.;Qu G.;Han J.;Rodrigues M. R. D.;Kowalski S.;Keutgen T.;Hagel K.;Barbui M.;Bonasera A.;Natowitz J. B.
用不同N/Z不对称性的13个反应系统产生的中等质量碎片(IMF)实验研究了核温度与源中子-质子(N/Z)不对称性的关系。这些中等质量碎片是在40 MeV/核子上产生的中等质量碎片，它们分别位于Sn112和Zn70上，Ni64和Sn112,124，Ni58，64，Au197和Th232上。这些系统的表观源温度是根据使用8个与碳有关的双同位素比温度计测量的中速源的IMF产额确定的。在理论模拟的帮助下，从提取的视温度和相对温度变化的N/Z不对称关系中定性地推断出源温度的N/Z不对称关系较弱。本文的结果与其他现有实验的结果进行了比较。
The dependence of the nuclear temperature on the source neutron-proton (N/Z) asymmetry is experimentally investigated with the intermediate mass fragments (IMFs) generated from thirteen reaction systems with different N/Z asymmetries, Zn64 on Sn112 and Zn70, Ni64 on Sn112,124, Ni58,64, Au197, Th232 at 40 MeV/nucleon. The apparent source temperatures for these systems are determined from the measured IMF yields from the intermediate velocity sources using eight carbon-related double isotope ratio thermometers. A rather weak N/Z asymmetry dependence of the source temperature is qualitatively inferred from the extracted N/Z asymmetry dependence of the apparent temperature and that of the relative temperature change by the sequential decay effects with the help of the theoretical simulations. The present result is compared with those from other available experiments.