Absolute cross sections for dissociative electron attachment to NF3

被引：27
作者：
Nandi, D [1 ]
Rangwala, SA [1 ]
Kumar, SVK [1 ]
Krishnakumar, E [1 ]
机构：
[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
来源：
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2001年 / 205卷 / 1-3期
关键词：
absolute cross sections; dissociative electron attachment; NF3;
D O I：
10.1016/S1387-3806(00)00270-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Absolute dissociative electron attachment cross sections for the formation of F-, F-2(-), and NF2- from NF3 have been measured in a crossed beams geometry by using the relative flow technique. Discrimination against ions with high kinetic energy are eliminated by employing a pulsed electron beam, pulsed ion extraction and a segmented time of flight mass spectrometer. The cross sections for the F- formation, which is the dominant channel, is found to be almost a factor of 2 larger than what is reported earlier. This descrepancy is explained in terms of the discrimination against ions of appreciable kinetic energy in earlier measurements. (C) 2001 Elsevier Science B.V.
引用
收藏
页码：111 / 117
页数：7
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