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Record 20 of 1703
Photoabsorption and photoionization cross sections of NH3, PH3, H2S, C2H2, and C2H4 in the VUV region
External Online Source: doi:10.1016/0022-4073(91)90102-V
Author and Affiliation:
Xia, T. J.(University of Southern California, Los Angeles, CA, United States)
Chien, T. S.(University of Southern California, Los Angeles, CA, United States)
Wu, C. Y. Robert(University of Southern California, Los Angeles, CA, United States)
Judge, D. L.(Southern California, University, Los Angeles, CA, United States)
Abstract: Using synchrotron radiation as a continuum light source, the photoabsorption and photoionization cross sections of NH3, PH3, H2S, C2H2, and C2H4 have been measured from their respective ionization thresholds to 1060 A. The vibrational constants associated with the nu(2) totally symmetric, out-of-plane bending vibration of the ground electronic state of PH3(+) have been obtained. The cross sections and quantum yields for producing neutral products through photoexcitation of these molecules in the given spectral regions have also been determined. In the present work, autoionization processes were found to be less important than dissociation and predissociation processes in NH3, PH3, and C2H4. Several experimental techniques have been employed in order to examine the various possible systematic errors critically.
Publication Date: Feb 01, 1991
Document ID:
19910034918
(Acquired Nov 28, 1995)
Accession Number: 91A19541
Subject Category: ATOMIC AND MOLECULAR PHYSICS
Document Type: Journal Article
Publication Information: Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073); 45; 77-91
Publisher Information: United Kingdom
Contract/Grant/Task Num: NSF DMR-74-15089; NAGW-1924
Financial Sponsor: NASA; United States
Organization Source: University of Southern California; Los Angeles, CA, United States
Description: 15p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ABSORPTION CROSS SECTIONS; FAR ULTRAVIOLET RADIATION; IONIZATION CROSS SECTIONS; PHOTOABSORPTION; PHOTOIONIZATION; ACETYLENE; AMMONIA; ETHYLENE; HYDROGEN SULFIDE; PHOSPHINES; PHOTOEXCITATION
Imprint And Other Notes: Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 45, Feb. 1991, p. 77-91.
Availability Source: Other Sources
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