POSDIF — A program to compute positron diffusion and annihilation in rare gases

Title of program: POSDIF Catalogue Id: AAHN_v1_0 Nature of problem Calculates positron lifetime spectrum in a gas being given the gas pressure and temperature, the value of the external electric field strength and the fits to momentum dependence of the positron-atom momentum transfer cross section and of the effective charge number. Versions of this program held in the CPC repository in Mendeley Data AAHN_v1_0; POSDIF; 10.1016/0010-4655(82)90079-0 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)程序名称：POSDIF 目录编号：AAHN_v1_0 问题本质 本程序可基于给定的气体压强、温度、外电场强度，以及正电子-原子动量转移截面与有效电荷数的动量依赖性拟合结果，计算气体中的正电子寿命谱。 孟德莱数据（Mendeley Data）中CPC程序库仓库收录的本程序版本： AAHN_v1_0; POSDIF; 10.1016/0010-4655(82)90079-0 本程序源自贝尔法斯特女王大学托管的CPC程序库（1969-2018）