EINSTEIN A-COEFFICIENTS FOR TRANSITIONS AMONG THE 3S(2)3P(3) STATES OF S-II

被引：54
|
作者：
KEENAN, FP
HIBBERT, A
OJHA, PC
CONLON, ES
机构：
[1] QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND
[2] UNIV ULSTER,NEWTOWNABBEY BT39 0QB,NORTH IRELAND
来源：
PHYSICA SCRIPTA | 1993年 / 48卷 / 02期
关键词：
D O I：
10.1088/0031-8949/48/2/001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Einstein A-coefficients for transitions among the 3s(2)3p3 states of SII, calculated with the CIV3 code, are found to be up to approximately 25% different from those of Mendoza and Zeippen. These new results are used to derive the theoretical emission line ratio R = I(3s(2)3p3 4S3/2o-3s(2)3p3 2D5/2o)/ I(3S(2)3P3 4S3/2o-3s(2)3p3 2D3/2o) = I(6717 angstrom)/I(6730 angstrom), which is a very useful electron density diagnostic for gaseous nebulae. The present diagnostics are up to approximately 10% larger than those deduced using the A-values of Mendoza and Zeippen, and will lead to electron density estimates up to approximately 50% greater.
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页码：129 / 130
页数：2
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