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Studies of collisional selection rules in thioformaldehyde (H2CS) by microwave-optical double resonance

DOITrouver le DOI : https://doi.org/10.1063/1.2060708
AuteurRechercher : 1; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches Canada. Institut Steacie des sciences moléculaires du CNRC
FormatTexte, Article
Sujetexcited states; microwave-optical double resonance; molecular electronic states; molecule-molecule collisions; organic compounds; radiative lifetimes; rotational states
Résumé
Individual rotational levels in the A1A2,v4 = 1 state of thioformaldehyde (H2CS) are excited by a cw laser and microwave transitions in the region of 8–12 GHz are measured. Some of the microwave frequencies are found to be characteristic of rotational levels other than the level being pumped. Since the microwave frequencies are characteristic of individual rotational levels in the excited state and the excited-state lifetime is ∼ 170 μs, information is obtained concerning rotational selection rules during collisions. It is found that J can change by several units and Ka by 0, ±2, ±4, and ±6. The latter result confirms that o-H2CS is not converted to p-H2CS by collisions. Observation of Ka doublets indicates that there are no appreciable differences between the two components.indicates that there are no appreciable differences between the two components.
Date de publication
Dans
  • The Journal of Chemical Physics 123, nº 15 (15 octobre 2005) : 154310-1–154310-3.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC12338653
Exporter la noticeExporter en format RIS
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Identificateur de l’enregistrementfa2e8c3c-0087-47fd-8096-b0aa428328cf
Enregistrement créé2009-09-10
Enregistrement modifié2020-04-07

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