Hyperfine population measurement of excited OH from H2O photodissociation by microwave stimulation - first results

Authors
Thissen, T Wurps, H Spiecker, H ter Meulen, JJ Andresen, P
Citation
T. Thissen et al., Hyperfine population measurement of excited OH from H2O photodissociation by microwave stimulation - first results, ASTR AST SS, 139(3), 1999, pp. 625-628
Citations number
14
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
ISSN journal
03650138 → ACNP
Volume
139
Issue
3
Year of publication
1999
Pages
625 - 628
Database
ISI
SICI code
0365-0138(199911)139:3<625:HPMOEO>2.0.ZU;2-I
Abstract
In this paper the first measurement of the hyperfine population of a photof ragment is presented. The population of the hyperfine levels of the (2)Pi(3 /2)(J = 7/2) state of OH out of photodissociation of cold H2O turns out to be statistical. After photodissociation of water at 157 nn within a Fabry-P erot microwave cavity the nascent OH formed in the upsilon = 0, J = 7/2 sta te (probed by LIF) is stimulated by microwave radiation. From saturation da ta the population in each hyperfine level in both Lambda-doublets is determ ined.