A novel method for stellar electron-capture rates of excited nuclear states
A novel method for stellar electron-capture rates of excited nuclear states
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一种计算激发核态恒星电子捕获率的新方法
DOI：
10.1016/j.physletb.2020.135432
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发表时间：
2020-06
影响因子：
4.4
通讯作者：
Yang Sun
中科院分区：
文献类型：
--
作者：
Liang Tan;Yi-Xiu Liu;Long-Jun Wang;Zhipan Li;Yang Sun
我们提出了一种新的壳层模型方法来计算高激发态的恒星电子俘获率。该方法基于投影壳模型，可以在大模型空间中包含高阶多准粒子构型。以59co到59fe的EC计算为例，研究了核激励（包括单粒子和集体激励）对恒星EC速率的影响。我们发现，预测的EC速率随母核和子核的激发而有很大的变化，这敏感地取决于恒星环境中的密度和温度。我们强调了在大型模型空间中包含多准粒子构型对于天体物理研究中使用的EC速率计算的重要性。
We propose a novel shell-model method to calculate stellar electron-capture (EC) rates of highly-excited nuclear states. This method is based on the Projected Shell Model that can incorporate high-order multi-quasiparticle configurations in a large model space. By taking the EC calculation from59Co to59Fe as the first example, we study the effects of nuclear excitations (including both single-particle and collective excitations) on the stellar EC rates. It is found that the predicted EC rates exhibit large variations as functions of excitations in both parent and daughter nuclei, which sensitively depend on the density and temperature in the stellar environment. We emphasize the importance of inclusion of multi-quasiparticle configurations constructed in a large model space for the calculation of EC rates used in astrophysical studies.
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影响因子：
3.1
作者：
Jiangming Yao;Jiangming Yao;Jiangming Yao;L. Song;K. Hagino;P. Ring;P. Ring;P. Ring;J. Me
通讯作者：
Jiangming Yao;Jiangming Yao;Jiangming Yao;L. Song;K. Hagino;P. Ring;P. Ring;P. Ring;J. Me
影响因子：
3.1
作者：
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影响因子：
1.8
作者：
B. A. Brown;B. Wildenthal
通讯作者：
B. A. Brown;B. Wildenthal
影响因子：
1.8
作者：
K. Langanke;G. Martínez-Pinedo
通讯作者：
K. Langanke;G. Martínez-Pinedo
影响因子：
64.8
作者：
H. Schatz;Sanjib S. Gupta;P. Moller;M. Beard;E. Brown;Alex Deibel;L. Gasques;W. Hix;L. Keek;R. Lau;A. Steiner;M. Wiescher
通讯作者：
H. Schatz;Sanjib S. Gupta;P. Moller;M. Beard;E. Brown;Alex Deibel;L. Gasques;W. Hix;L. Keek;R. Lau;A. Steiner;M. Wiescher