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Absolute I(asterisk) quantum yields for the ICN A state by diode laser gain-vs-absorption spectroscopyAbsolute I(asterisk) quantum yields have been measured as a function of wavelength for room temperature photodissociation of the ICN A state continuum. The yields are obtained by the technique of time-resolved diode laser gain-vs-absorption spectroscopy. Quantum yields are evaluated at seven wavelengths from 248 to 284 nm. The yield at 266 nm is 66.0 + or - 2 percent and it falls off to 53.4 + or - 2 percent and 44.0 + or - 4 percent at 284 and 248 nm, respectively. The latter values are significantly higher than those obtained by previous workers using infrared fluorescence. Estimates of I(asterisk) quantum yields obtained from analysis of CN photofragment rotational distributions, as discussed by other workers, are in good agreement with the I(asterisk) yields reported here. The results are considered in conjunction with recent theoretical and experimental work on the CN rotational distributions and with previous I(asterisk) quantum yield results.
Document ID
19870050647
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hess, Wayne P.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Leone, Stephen R.
(Joint Institute for Laboratory Astrophysics; Colorado, University; NBS, Boulder, CO, United States)
Date Acquired
August 13, 2013
Publication Date
April 1, 1987
Publication Information
Publication: Journal of Chemical Physics
Volume: 86
ISSN: 0021-9606
Subject Category
Atomic And Molecular Physics
Accession Number
87A37921
Distribution Limits
Public
Copyright
Other

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