EVIDENCE FOR A REACTION WINDOW IN DOUBLE-ELECTRON-CAPTURE REACTIONS IN COLLISIONS INVOLVING THE MOLECULAR TARGET CH3BR

被引：33

作者：

LANGFORD, ML ^{[1
]}

HARRIS, FM ^{[1
]}

机构：

[1] UNIV COLL SWANSEA,MASS SPECTROMETRY RES UNIT,SINGLETON PK,SWANSEA SA2 8PP,W GLAM,WALES

来源：

RAPID COMMUNICATIONS IN MASS SPECTROMETRY | 1990年 / 4卷 / 04期

关键词：

D O I：

10.1002/rcm.1290040408

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Double‐electron‐capture reactions in which singly charged projectile ions A+ convert to negative ions A− in collisions with molecules M are endoergic. Non‐zero cross‐sections for the reactions occur when the endoergicities fall within a ‘reaction window’. The existence of a window for reactions with CH3Br molecules is demonstrated in this investigation by altering the population of ground and excited states of the resulting CH3Br2+ ions using three projectile ions, S+˙, OH+ and F+ which markedly alters the endoergicities of the double‐electron‐capture reactions. Analysis of the energy‐loss spectra indicates that the reaction window for CH3Br is between endoergicities of about 8 and 22 eV. Using F+ as the projectile ion, it is shown that the population of the more highly excited states of CH3Br2+ is enhanced. Copyright © 1990 Heyden & Son Limited

引用

页码：125 / 128

页数：4

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