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arXiv 1104.1683nucl-th
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用有限温度相对论随机相位近似计算恒星电子俘获率

Stellar electron-capture rates calculated with the finite-temperature relativistic random-phase approximation

YiFei Niu, Nils Paar, Dario Vretenar, Jie Meng

摘要:

本文介绍了一个基于相对论能量密度泛函的自洽微观理论框架,用于模拟恒星环境中电子在原子核上的俘获过程。用有限温度相对论平均场模型计算了靶核中的单核子基和占据因子,用自洽的有限温度相对论无规相近似描述了$J^π = 0^{\pm}$,$1^{\pm}$,$2^{\pm}$的电荷交换跃迁.计算了恒星环境中~(54,56)Fe和~(76,78)Ge的电子俘获截面和俘获率,并与相似和互补模型的计算结果进行了比较.

英文摘要:

We introduce a self-consistent microscopic theoretical framework for modelling the process of electron capture on nuclei in stellar environment, based on relativistic energy density functionals. The finite-temperature relativistic mean-field model is used to calculate the single-nucleon basis and the occupation factors in a target nucleus, and $J^π = 0^{\pm}$, $1^{\pm}$, $2^{\pm}$ charge-exchange transitions are described by the self-consistent finite-temperature relativistic random-phase approximation. Cross sections and rates are calculated for electron capture on 54,56Fe and 76,78Ge in stellar environment, and results compared with predictions of similar and complementary model calculations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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