Translational and vibrational energy release in nitrogen recombinative desoprtion from Cu(111)

被引:15
作者
Murphy, MJ [1 ]
Skelly, JF [1 ]
Hodgson, A [1 ]
机构
[1] UNIV LIVERPOOL,SURFACE SCI RES CTR,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND
关键词
D O I
10.1016/S0009-2614(97)00969-X
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
Nitrogen recombinative desorption from Cu(111) has been investigated using resonance enhanced multiphoton ionisation and ion time of flight measurements to obtain the release into N-2 product vibrational and translational excitation. N-2(v = 0) desorbs from a 700K surface with a mean translational energy perpendicular to the surface of 4.2 eV, a substantial fraction of the N-2 bond strength. The desorbed molecules an vibrationally hot, with a population ratio P(v = 1)/P(v = 0) = 0.52, corresponding to a vibrational temperature of 5100 K, Md N-2(v = 1) shows a slightly lower translational energy release than the ground state. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:112 / 118
页数:7
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