COLLISIONAL RATES AND COOLING WITHIN ATOMIC-HYDROGEN PLASMAS

被引：59

作者：

SCHOLZ, TT ^{[1
]}

WALTERS, HRJ ^{[1
]}

机构：

[1] QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 380卷 / 01期

关键词：

ATOMIC PROCESSES; PLASMAS; TRANSITION PROBABILITIES;

D O I：

10.1086/170587

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Accurate collisional rates for electron impact ionization of the ground state of atomic hydrogen are evaluated by convolving the experimental cross section with a Maxwellian distribution of electronic energies. An extension of previous work on 1s-2s and 1s-2p scattering rates is also reported. These results are supplemented by semiempirical collisional rates for other excitation processes to yield the cooling rate for optically thin hydrogen plasmas. Our numerical results are evaluated for temperatures ranging from 2 x 10(3) K to 1 x 10(8) K and fitted to simple analytic formulae designed to be easily incorporated into computer programs.

引用

页码：302 / 306

页数：5

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