THRESHOLD PHOTODETACHMENT OF COLD C60-

被引：312
|
作者：
WANG, LS [1 ]
CONCEICAO, J [1 ]
JIN, CM [1 ]
SMALLEY, RE [1 ]
机构：
[1] RICE UNIV,DEPT CHEM & PHYS,HOUSTON,TX 77251
来源：
CHEMICAL PHYSICS LETTERS | 1991年 / 182卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0009-2614(91)80094-E
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：
Threshold photodetachment of cold C60- has been investigated with a tunable dye laser from 2.55 to 2.80eV. The cold C60- was produced through laser vaporization of a purified C60 target with a specially designed nozzle. The threshold behavior of the detachment cross section as a function of energy was found to be well described by Wigner's threshold law plus a dominating polarization term. The electron affinity of C60 was measured to be 2.650 +/- 0.050 eV. Two unique effects, which are characteristic of bulk materials, were observed in this nano-sized molecule, i.e. the thermionic emission and the inelastic electron-"phonon" scattering effects, with the former strongly dependent on the laser fluences and the later on both the internal temperature of C60-and the photoelectron kinetic energy.
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页码：5 / 11
页数：7
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