NO angular distributions in the photodissociation of (NO)2 at 213 nm: Deviations from axial recoil
| Autor: | Hanna Reisler, V. Dribinski, A. B. Potter, A. V. Demyanenko |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 117:2568-2577 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.1490599 |
| Popis: | Angular distributions of selected rotational states of NO(A 2Σ+,ν=0) products obtained in the 213 nm photodissociation of (NO)2 have been determined in a molecular beam by using the photofragment ion imaging technique. Specifically, images of NO(A,ν=0) products in N=0, 11, and 19 have been recorded, for which the maximum energies available to the NO(X 2Π) products are 2038, 1774, and 1278 cm−1, respectively. The recoil anisotropy parameter of the photofragments, βeff, decreases significantly at low center-of-mass translational energies from its maximum value of 1.36±0.05, and depends strongly on the rotational angular momentum of the photoproducts. This behavior is described well by a classical model that takes into account the transverse recoil component mandated by angular momentum conservation. For each of the observed NO(A) N states, highly rotating NO(X) levels are produced via planar dissociation, and the angular momenta are established at an interfragment separation of about 2.6 A. For most of the ... |
| Databáze: | OpenAIRE |
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