ON THE CALCULATION OF MAXWELLIAN-AVERAGED CAPTURE CROSS-SECTIONS

被引:134
作者
BEER, H [1 ]
VOSS, F [1 ]
WINTERS, RR [1 ]
机构
[1] DENISON UNIV,DEPT PHYS & ASTRON,GRANVILLE,OH 43023
关键词
ABUNDANCES; NUCLEAR REACTIONS; NUCLEOSYNTHESIS;
D O I
10.1086/191669
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper we discuss a recipe for the calculation of Maxwellian-averaged capture cross sections as a function of temperature kT from the existing excitation function. Detailed formulae are given to handle the various portions of this excitation function which in general contains both resolved resonance and an unresolved resonance parts. For the temperature region considered, the details of the thermal (0.0253 eV) capture cross section and a possible direct capture component are of importance. We discuss the treatment of resolved resonances depending on the characteristics of the resonance parameters. Particular attention is given to a commonly encountered situation in which the excitation function is known only over a portion of the relevant energy range. In addition to a compilation of calculated Maxwellian-averaged capture cross sections versus temperature, special examples are discussed to illustrate the various details of the recipe.
引用
收藏
页码:403 / 424
页数:22
相关论文
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