25 keV附近中子平均俘获截面〈σ_(nγ)〉系统学研究

SYSTEMATICS OF NEUTRON AVERAGE RADIATIVE CAPTURE CROSS SECTIONS <σnγ> AT 25 keV

摘要: 文章研究了25keV附近中子平均俘获截面随质量数A、有效激发能U及能级密度参数α的系统学依赖性。给出系统学公式为〈σ_(nγ)〉=0.3482A~(-1.033)U~(-0.2438)α~(0.8569)exp1.011(αU)~(1/2)

Abstract: The systematic behaviours of average radiative capture cross sections <σ_(nγ)> at25 keV on mass number A, effective excitation energy U and level densityparameter a are studied. The systematics formula is found as follows:<σ_(nγ)>=0. 3482A~(-1.033)U~(-0.2438)α~(0.8569)exp (1. 011(αU)~(1/2)).