DYNAMICS OF AN ELEMENTARY BOND-FORMING PROCESS - ASSOCIATIVE IONIZATION IN H(1S) + H(2S) COLLISIONS

被引：43

作者：

URBAIN, X

CORNET, A

BROUILLARD, F

GIUSTISUZOR, A

机构：

[1] UNIV PARIS 06,CHIM PHYS LAB,F-75005 PARIS,FRANCE

[2] UNIV PARIS 11,PHOTOPHYS MOLEC LAB,F-91405 ORSAY,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.66.1685

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a merged-beam apparatus, we have measured the absolute cross section for the associative ionization process H(1s) + H(2s) --> H2+e- between 0.5 and 10 eV. The total cross section rises until a maximum of 2.4 x 10(-17) cm2 at the H2+ dissociation threshold (3.4 eV) and exhibits a minimum around 2 eV. We attribute this feature to interferences between two reaction paths. Calculations combining a quantum-defect treatment of the multichannel ionization with a close-coupling treatment of the atom-atom half collision yield results in good agreement with experiment.

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页码：1685 / 1688

页数：4

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