VELOCITY AND ANGULAR DISTRIBUTIONS OF CATIONS PRODUCED UPON LASER-DESORPTION OF C-60 AND C60OX (X=2-4)

被引：13

作者：

BECK, RD ^{[1
]}

WEIS, P ^{[1
]}

ROCKENBERGER, J ^{[1
]}

KAPPES, MM ^{[1
]}

机构：

[1] UNIV KARLSRUHE,INST PHYS CHEM,D-76128 KARLSRUHE,GERMANY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 12期

关键词：

D O I：

10.1021/j100012a020

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 mechanism of UV laser desorption/ionization of C-60 and C60Ox (x = 2-4) has been studied by measuring the angle and arrival time distribution for positive ions generated upon laser irradiation of microcrystalline targets. Observations include evidence for desorption ''jet'' formation as well as for on-beam axis enrichment of coalescence products. These measurements imply that internal and kinetic energy of promptly desorbing material are correlated and suggest that coalescence products such as C-118(+) are generated within the material ablated by one laser pulse rather than from previous photopolymerization. The data are contrasted to laser desorption measurements of NaI/CsI mixed targets for which near effusive ion velocity distributions are observed.

引用

页码：3990 / 3999

页数：10

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