MEASUREMENT OF ELECTRON-IMPACT EXCITATION CROSS-SECTIONS FOR HELIUM-LIKE TITANIUM

被引：51

作者：

CHANTRENNE, S ^{[1
]}

BEIERSDORFER, P ^{[1
]}

CAUBLE, R ^{[1
]}

SCHNEIDER, MB ^{[1
]}

机构：

[1] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.69.265

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have obtained the first measurement of electron impact excitation cross sections as a function of energy for a highly charged ion. Collisional excitation cross sections to four n = 2 levels of He-like titanium were measured from threshold to 1.7 times threshold. The data conform well to established theory, especially for direct excitation; however, significant differences are found with predicted contributions from resonance excitation and in the treatment of radiative cascades. The latter changes plasma temperatures inferred from titanium K-alpha line intensities by as much as a factor of 2.

引用

页码：265 / 268

页数：4

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