ABSOLUTE CROSS-SECTION FOR DISSOCIATIVE ELECTRON-ATTACHMENT IN O-2 CONDENSED ON KR FILM

被引:63
作者
SAMBE, H [1 ]
RAMAKER, DE [1 ]
DESCHENES, M [1 ]
BASS, AD [1 ]
SANCHE, L [1 ]
机构
[1] UNIV SHERBROOKE,FAC MED,CANADIAN MED RES COUNCIL GRP RADIAT SCI,SHERBROOKE J1H 5N4,QUEBEC,CANADA
关键词
D O I
10.1103/PhysRevLett.64.523
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The absolute dissociative-electron-attachment cross section for O2 condensed on a Kr film is found to be about 20 times larger than that for gaseous O2. This large enhancement is attributed to a downward energy shift (0.9 eV) of the O2- (2 u) intermediate state due to electronic polarization of the neighboring Kr atoms. Based on the theory developed by OMalley [Phys. Rev. 150, 14 (1966)] and 155, 59 (1967)], we have shown that this downward shift increases the dissociative attachment by a factor of about 21, through a reduction in the autoionization of the intermediate state. © 1990 The American Physical Society.
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页码:523 / 526
页数:4
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