核天体物理反应率拟合方法研究

发布时间：2018-02-23 20:15

本文关键词： 核天体物理反应率拟合方法相对离差　出处：《原子能科学技术》2015年11期 　论文类型：期刊论文

【摘要】：为进行大规模核天体网络运算,通常将核天体物理反应率拟合为与温度相关的数值表达式,以简化程序中的核物理输入量。通过分析国际上常用的几种核天体物理数据库,本工作得到了一种新的拟合方法,其对反应率的拟合精度较目前国际上通用的REACLIB和NACRE数据库的拟合方法的有明显改善。该拟合方法适用于直接反应和窄共振、宽共振、阈下共振和多谐共振反应,方便建立核天体物理反应率数据库。
[Abstract]:In order to perform large-scale nuclear astrophysical network operation, the nuclear astrophysical reaction rate is usually fitted to a numerical expression related to temperature, in order to simplify the nuclear physical input in the program. By analyzing several kinds of nuclear astrophysical databases commonly used in the world, In this work, a new fitting method is obtained, and the fitting accuracy of the reaction rate is obviously improved compared with that of REACLIB and NACRE databases, which are widely used in the world. This fitting method is suitable for direct reaction, narrow resonance and wide resonance. Subliminal resonance and multiharmonic resonance facilitate the establishment of a database of nuclear astrophysical reactivity.
【作者单位】：中国原子能科学研究院核物理研究所;南京航空航天大学材料科学与技术学院;
【分类号】：P144

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