Hyperfine population measurement of excited OH from $\rm H_2O$ photodissociation by microwave stimulation – first results

Autor:	P. Andresen, T. Thissen, H. Spiecker, J. J. ter Meulen, H. Wurps
Rok vydání:	1999
Předmět:	Physics education.field_of_study Photodissociation Population General Physics and Astronomy law.invention law Excited state Maser Atomic physics education Saturation (magnetic) Hyperfine structure Microwave Microwave cavity
Zdroj:	Astronomy and Astrophysics Supplement Series. 139:625-628
ISSN:	1286-4846 0365-0138
DOI:	10.1051/aas:1999410
Popis:	In this paper the rst measurement of the hy- perne population of a photofragment is presented. The population of the hyperne levels of the 2 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 nm within a Fabry-Perot microwave cavity the nascent OH formed in the v =0 , J =7 =2 state (probed by LIF) is stimulated by microwave radiation. From saturation data the population in each hyperne level in both -doublets is determined.
Databáze:	OpenAIRE
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