Benchmark Integral Cross Sections for Electron Impact Excitation of the n = 2 States in Helium

In this paper, we present integral cross sections （ICS） for electron impact excitation of the n = 2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 2^3S, 2^1S, 2^3P and 2^1P, has been determined by integration of the angular differential cross sections （...

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Bibliographic Details
Published in:Plasma science & technology 2010-06, Vol.12 (3), p.348-352
Main Authors: Hoshino, M, Kato, H, Suzuki, D, Tanaka, H, Bray, I, Fursa, D. V, Buckman, S. J, Ingólfsson, O, Brunger, M. J
Format: Article
Language:English
Subjects:
3S技术
Accuracy
Benchmarking
Cross sections
Electron impact excitation
Extrapolation
Helium
ICS
Integrals
Joining
Mathematical analysis
电子碰撞激发
积分截面
能量范围
集散控制系统
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Summary:In this paper, we present integral cross sections （ICS） for electron impact excitation of the n = 2 levels in helium in the impact energy range of 23.5 eV to 35 eV. The ICS of each final state, 2^3S, 2^1S, 2^3P and 2^1P, has been determined by integration of the angular differential cross sections （DCS） over all of 0° to 180°, where those DCS were obtained from both our previous experiments and the extrapolation using the convergent close coupling calculation. The present experimental ICS for the optically allowed 21P transition state are also compared with those obtained from the BE f-scaling method. Very good agreement between the experimental and BE f-scaled 21P ICSs is generally found in the measured impact energy region.
ISSN:1009-0630
DOI:10.1088/1009-0630/12/3/20