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The production of NH(A 3Pi i) through photodissociative excitation of NH3The NH(A-X) emission produced by photodissociation of NH3 is examined using a line emission source in the 600-1340 A region. It is observed that the production of the NH(A 3Pi i) photofragment involves a spin-forbidden transition. Fluorescence spectra of NH3 are derived and analyzed. The relationship between fluorescence cross sections and fluorescence count rates and gas pressure is studied. The fluorescence cross sections of NH(A-X) are calculated as 2.1 x 10 to the -22nd, 3.1 x 10 to the -22nd, 3.0 x 10 to the -21st, 1.5 x 10 to the -20th, and 3.4 x 10 to the -20th sq cm for the primary photon wavelength of 1239, 1184, 1065, 1037, and 976 A, respectively; and the corresponding fluorescence quantum yields are 0.00002, 0.00003, 0.0012, 0.0085, and 0.015.
Document ID
19870056059
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wu, C. Y. Robert
(Southern California, University Los Angeles, CA, United States)
Date Acquired
August 13, 2013
Publication Date
May 15, 1987
Publication Information
Publication: Journal of Chemical Physics
Volume: 86
ISSN: 0021-9606
Subject Category
Atomic And Molecular Physics
Accession Number
87A43333
Funding Number(s)
CONTRACT_GRANT: NGR-05-018-180
Distribution Limits
Public
Copyright
Other

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