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Photodissociation of Ar+3 cluster ion

✍ Scribed by Takashi Nagata; Jun Hirokawa; Tsutomu Ikegami; Tamotsu Kondow; Suehiro Iwata

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
561 KB
Volume
171
Category
Article
ISSN
0009-2614

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✦ Synopsis

The time-of-flight spectra of Ar+ produced in the photodissociation of Ar: were observed in the wavelength range of 460-590 nm. Analysis revealed that (I ) the kinetic energy distribution of Ar* fragments is bimodal: the components having a released kinetic energy of x0.5-1.0 eV (fast component) and almost zero kinetic energy (slow component), ( ) the fragment angular distribution displays an anisotropy characteristic of direct dissociation involving a parallel-type transition, and (3 ) the formation of the fast component is the dominant channel with a branching fraction more than 80%. A dissociation mechanism involving a linear symmetric precursor is proposed on the basis of ab initio calculations for the potential energy surfaces of Ar:.

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