EXPERIMENTAL TRIPLE DIFFERENTIAL CROSS-SECTIONS ON AN ABSOLUTE SCALE FOR ELECTRON-IMPACT IONIZATION OF HELIUM IN A SYMMETRIC COPLANAR GEOMETRY

被引：11

作者：

GELEBART, F ^{[1
]}

DEFRANCE, P ^{[1
]}

PERESSE, J ^{[1
]}

机构：

[1] CATHOLIC UNIV LOUVAIN,INST PHYS CORPUSCULAIRE,B-1348 LOUVAIN LA NEUVE,BELGIUM

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1990年 / 23卷 / 08期

关键词：

D O I：

10.1088/0953-4075/23/8/010

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Experimental measurements of triple differential cross sections for electron impact ionisation of helium at 200 eV incident energy are put on an absolute scale. A symmetric coplanar energy-sharing geometry is considered, with the common angle of the scattered and ejected electrons in the range 20’ to 115’. This method makes use of the physical significance of the ratio of the number of counts in the coincidence peak to the average count rate in the accidental coincidence background in order to obtain a normalisation to known elastic scattering cross sections. © 1990 IOP Publishing Ltd.

引用

页码：1337 / 1344

页数：8

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