BETHE APPROXIMATION - WHERE TO DRAW THE LINE

被引：19

作者：

HEDDLE, DWO

机构：

[1] Physics Department, Royal Holloway College, Egham, Surrey

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1979年 / 12卷 / 03期

关键词：

D O I：

10.1088/0022-3700/12/3/024

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Modifications of the well known Bethe expression for the asymptotic behaviour of cross sections for electron-impact excitation of optically allowed transitions are derived. Attention is drawn to a simple relation between the coefficient cj of the Bethe expression and the value of energy at which the polarisation of the impact radiation passes through zero. This relation is used to examine experimental data for the Lyman- alpha line of hydrogen, the 501.6 nm line of helium and the 313 nm line of the beryllium ion.

引用

页码：489 / 496

页数：8

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