DISSOCIATIVE RECOMBINATION OF HCS+ AND H3S+ IONS STUDIED IN A FLOWING AFTERGLOW APPARATUS

被引：11

作者：

ABOUELAZIZ, H ^{[1
]}

QUEFFELEC, JL ^{[1
]}

REBRION, C ^{[1
]}

ROWE, BR ^{[1
]}

GOMET, JC ^{[1
]}

CANOSA, A ^{[1
]}

机构：

[1] DEPT PHYS ATOM & MOLEC,CAMPUS BEAULIEU,F-35042 RENNES,FRANCE

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 194卷 / 4-6期

关键词：

D O I：

10.1016/0009-2614(92)86049-N

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The rate coefficients-alpha for dissociative recombination of HCS+ and H3S+ ions have been studied in a flowing afterglow experiment at room temperature. HCS+ ions were produced via two different routes. The value of the rate coefficient-alpha(HCS+) was measured to be 5.8x10(-7) and 7.9x10(-7) cm3 s-1 when using respectively OCS+H2 or H2S as the reactant neutrals. This value is one order of magnitude larger than previous experimental and theoretical studies. The value obtained for alpha(H3S+) was 5.2x10(-7) cm3 s-1. in reasonable agreement with FALP results. The vibrational populations of the ions could not be determined in the present experiment so that these measurements could relate to a mixture of ions with different vibrational excitation. We argue that the high HCS+/CS ratio observed in interstellar clouds result from a low branching ratio towards the channel H+CS in HCS+ dissociative recombination.

引用

页码：263 / 267

页数：5

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