Radio recombination lines from H+ regions and cold interstellar clouds: Computation of the b n factors

Title of program: GENERAL BN PROGRAM
Catalogue Id: ACXI_v1_0

Nature of problem
Emission lines produced by the recombination of hydrogen and hydrogenic ions are observed from many astronomical sources; maser amplification is frequently present. The recombination line spectrum depends upon the populations of the energy levels of the emitting species. The present program computes the ratio, bn, of the population of energy level n to the (known) population in thermodynamic equilibrium for given values of electron temperature and density. A background radiation field may be pre ...

Versions of this program held in the CPC repository in Mendeley Data
ACXI_v1_0; GENERAL BN PROGRAM; 10.1016/0010-4655(77)90025-X

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

程序名称：GENERAL BN PROGRAM
目录编号：ACXI_v1_0

问题本质
诸多天文源均可观测到由氢及类氢离子复合过程产生的发射谱线，且常伴随脉泽（maser）放大效应。复合线光谱的分布取决于发射物种的能级布居数。本程序可针对给定的电子温度与电子密度参数，计算能级n的布居数与热力学平衡态下已知布居数的比值bn。可预设背景辐射场……

存放在Mendeley数据集中的CPC程序库版本：
ACXI_v1_0; GENERAL BN PROGRAM; 10.1016/0010-4655(77)90025-X

本程序源自贝尔法斯特女王大学维护的CPC程序库（1969-2019年）