DIFFERENTIAL CROSS-SECTIONS FOR THE ELECTRON-IMPACT EXCITATION OF N(3,1)S (N = 2, 3 AND 4) STATES OF HELIUM AT LOW ENERGIES

被引：11

作者：

FON, WC

LIM, KP

RATNAVELU, K

SAWEY, PMJ

机构：

[1] UNIV TEKNOL MARA, DEPT ENGN STUDIES, SELANGOR, MALAYSIA

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

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1994年 / 27卷 / 08期

关键词：

D O I：

10.1088/0953-4075/27/8/016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The 19-state and the 29-state R-matrix calculations are employed to obtain the differential cross sections for the 1(1)S-n3,1S (n = 2, 3 and 4) excitation of helium at carefully chosen non-resonance energies ranging from 22 to 29.6 eV. The scattering angle ranges from 0-degrees to 180-degrees. The results of the calculation are compared with the latest experiments of Trajmar et al and Allan. Attempts are made to show that the angular distributions of scattered electrons of the same incident velocity that have excited the n3S(or n1S) levels of helium for n = 2, 3 and 4 are almost identical when fitted together at one angle.

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页码：1561 / 1575

页数：15

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