MULTIPHOTON IONIZATION OF C60

被引：72

作者：

DING, D

COMPTON, RN

HAUFLER, RE

KLOTS, CE

机构：

[1] OAK RIDGE NATL LAB,CHEM PHYS SECT,POB 2008,OAK RIDGE,TN 37831

[2] UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 11期

关键词：

D O I：

10.1021/j100113a006

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：

The multiphoton ionization photoelectron spectrum (MPI-PES) of C60 using pulsed lasers of nanosecond duration shows prompt electrons resulting from direct two-photon ionization, as well as a dominant low-energy delayed electron signal which follows an approximately thermal energy distribution with average energy epsilonBAR = 0.30 +/- 0.05 eV. The MPI-PES together with the mass spectrum at lambda = 193 nm suggests an important role of intersystem crossing from the singlet to triplet manifold of C60. MPI at lambda = 193 nm is believed to result from such intersystem crossing followed by one-photon ionization of triplet C60. Under this assumption, the photoionization cross section for C60 in the lowest triplet state is estimated to be (5.1 +/- 2.0) x 10(-17) cm-2.

引用

页码：2500 / 2504

页数：5

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