DISSOCIATION OF MULTICHARGED CO MOLECULAR-IONS PRODUCED IN COLLISIONS WITH 97-MEV AR-14+ - DISSOCIATION FRACTIONS AND BRANCHING RATIOS

被引：26

作者：

WOHRER, K

SAMPOLL, G

WATSON, RL

CHABOT, M

HEBER, O

HORVAT, V

机构：

[1] TEXAS A&M UNIV SYST, INST CYCLOTRON, COLL STN, TX 77843 USA

[2] TEXAS A&M UNIV SYST, DEPT CHEM, COLL STN, TX 77843 USA

来源：

PHYSICAL REVIEW A | 1992年 / 46卷 / 07期

关键词：

D O I：

10.1103/PhysRevA.46.3929

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Data on the production and dissociation of CO(Q+) molecular ions (where Q = 1 through 7) obtained by ion-ion coincidence time-of-flight measurements were analyzed to determine production yields, dissociation fractions, and branching ratios. A detailed comparison of the dissociation fractions for CO+ and CO2+ for several collision systems in the same perturbative regime revealed them to be quite similar, whereas the dissociation fraction for CO+ produced by valence-electron photoionization is a factor of 1.8 to 3.6 larger. The results for Q greater-than-or-equal-to 2 indicated a preference for dissociation channels leading to symmetric or nearly symmetric charge division. An enhancement of the total ionization yields for Q > 4 was observed, and it suggests that electron transfer followed by LMM Auger decay plays an important role in determining the final charges of the dissociation products.

引用

页码：3929 / 3934

页数：6

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