ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
An experimental study of the photofragmentation of Ar3+ at wavelengths 〉650 nm has been undertaken in order to investigate the reaction channel Ar3++hν→Ar2++Ar. As a function of photon energy, measurements have been made of the Ar+/Ar2+ branching ratio and the relative kinetic energy of the photofragments. A steady decline observed for the latter as a function of decreasing photon energy, suggests that the dimer ions emerges from the photodissociation processes with a very high level of internal excitation. Supporting semiclassical calculations of the decay dynamics confirm the trend seen for the Ar+/Ar2+ branching ratio, but do not reproduce the quantitative details. The calculations do, however, provide strong support for an experimental analysis of the energetics of fragmentation, and show that Ar2+ can appear either in the electronic ground state, but with a very high degree of vibrational excitation, or in the weakly bound 2Πg electronic excited state. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.482030
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