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Fluorescence from VUV excitation of formaldehydeThe 105-180-nm photoabsorption and fluorescence cross sections of H2CO are determined experimentally using a synchrotron-radiation light source and the apparatus described by Lee (1980). The results are presented in tables and graphs and discussed. VUV emission with threshold wavelength 140.3 nm is detected and attributed to the A 1Pi - X 1Sigma(+) system of CO, and UV emission from the HCO (B-X) system is found below a 147.5-nm threshold, the H-HCO dissociation energy having an upper limit of 3.61 + or - 0.03 eV. At 116 nm, the maximum quantum yields of the VUV and UV fluorescences are about 1.6 and 0.23 percent, respectively.
Document ID
19870038278
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Suto, Masako
(San Diego State Univ. San Diego, CA, United States)
Wang, Xiuyan
(San Diego State Univ. San Diego, CA, United States)
Lee, L. C.
(San Diego State University CA, United States)
Date Acquired
August 13, 2013
Publication Date
October 15, 1986
Publication Information
Publication: Journal of Chemical Physics
Volume: 85
ISSN: 0021-9606
Subject Category
Atomic And Molecular Physics
Accession Number
87A25552
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-12618
CONTRACT_GRANT: NAGW-319
CONTRACT_GRANT: NSF DMR-80-20164
Distribution Limits
Public
Copyright
Other

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