ELECTRON-IMPACT ON FREE C-60 - EXCITED-STATES BELOW 10 EV

被引：24

作者：

ABOUAF, R ^{[1
]}

POMMIER, J ^{[1
]}

CVEJANOVIC, S ^{[1
]}

机构：

[1] INST PHYS, YU-11000 BELGRADE, YUGOSLAVIA

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 213卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(93)89149-C

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：

Electron energy loss spectra have been performed on C60 vapour, both at very low (E(r)=0), and at intermediate residual energies (up to E(r)=70 eV), along with an angular analysis of the scattered electrons. Besides the two strong bands at 3.78 and 4.84 eV, due to dipole-allowed transitions to 1T1u states, and the pi-pi* collective excitation at 6.1 eV, we have observed a band peaking at 2.26 eV, dominant at low residual energies, corresponding to superimposed transitions to triplet states, and dipole orbitally forbidden states. A new peak, likely to be of triplet character is observed at 2.96 eV. In contrast with similar studies on C60 films, we have not found any evidence of the lowest triplet state 3T2g at 1.55 eV.

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页码：503 / 508

页数：6

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