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Two-dimensional imaging of state-selected photofragments: the 355 nm photolysis of NO2

✍ Scribed by T. Suzuki; V.P. Hradil; S.A. Hewitt; P.L. Houston; B.J. Whitaker

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
719 KB
Volume
187
Category
Article
ISSN
0009-2614

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✦ Synopsis

Two-dimensional photofragment imaging has been applied to the 355 nm photodissociation of NO2 in a supersonic beam. The NO fragments are state-selectively ionized and projected onto a two-dimensional position-sensitive detector. The original velocity distribution is reconstructed by an Abel transform of the observed image of the fragments. The speed distribution of a single rovibrational state of NO consists of a single peak as expected from conservation of momentum and energy. The anisotropy parameter, 8, of the NO photofragments is found to be 1.40 20.20, which is significantly larger than previously reported values measured with effusive molecular beams. This discrepancy IS explained by the effect ofthe rotation of the parent molecule.

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