中子辐照量指数分布函数式中比例系数的确定  

Determination of Cofficient in Exponential Expression of Neutron Exposure Distribution

作　　者：张凤华[1] 张波[2] 

机构地区：[1]沧州师范专科学校物理系,河北沧州061001 [2]河北师范大学物理系,河北石家庄050016

出　　处：《河北科技大学学报》2003年第3期7-9,53,共4页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(19973002)

摘　　要：讨论如何确定中子辐照量分布函数ρ(τ)=C_1(1-r)/△τr^(τ/△τ)=C_2/τ_0exp(-τ/τ_0)中的比例系数C_1和C_2的值。结果表明,C_1由归一化条件确定,通常取为1。但是C_2≠C_1,C_2/C_1的值完全由重叠因子r的值确定,即r=1时,C_2/C_1=1;0<r<1时,C_2/C_1=(r-1)/Inr。进一步的讨论还表明,0<r<1时,C_2/C_1小于1且随r增大而增大。We discuss how to determine the coefficient C1 and C2 in the expression of neutron exposure distribution ρ(τ) = C1 (1- r)/△τrr/△r = C2/τoexp( -τ/τ0). The results show that C1 is determined by the normalization condition and generally taken as 1. And C2≠C1 ,C2/C1 is completely determined by the overlap factor r,i. e. ,C2/ C1 =1 when r=1 and C2/C1 =(r-1)/lnr when 0<r<1. The further discussion argues that when 0<r<1.C2/ C1 is less than 1 and increases with r.

关 键 词：慢中子俘获过程 中子辐照量 分布函数 比例系数 AGB星 核合成 重叠因子 

分 类 号：P142.8[天文地球—天体物理]