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Precision measurements of photoabsorption cross sections of Ar, Kr, Xe, and selected molecules at 58.4, 73.6, and 74.4 nmAbsolute absorption cross sections have been measured for the rare gases at 58.43, 73.59, and 74.37 nm with an accuracy of + or - 0.8 percent. For the molecules H2, N2, O2, CO, N2O, CO2, and CH4, precision measurements were made at 58.43 nm with an accuracy of + or - 0.8 percent. Molecular absorption cross sections are also reported at 73.59 and 74.37 nm. However, in the vicinity of these wavelengths most molecules exhibit considerable structure, and cross sections measured at these wavelengths may depend on the widths and the amounts of self-reversal of these resonance lines. A detailed discussion is given of the systematic errors encountered with the double-ion chamber used in the cross-sectional measurements. Details are also given of precision pressure measurements.
Document ID
19900031986
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Samson, James A. R.
(Nebraska Univ. Lincoln, NE, United States)
Yin, Lifeng
(Nebraska, University Lincoln, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1989
Publication Information
Publication: Optical Society of America, Journal, B: Optical Physics
Volume: 6
ISSN: 0740-3224
Subject Category
Atomic And Molecular Physics
Accession Number
90A19041
Funding Number(s)
CONTRACT_GRANT: NSF ATM-86-17670
CONTRACT_GRANT: NGR-28-004-021
CONTRACT_GRANT: NSF PHY-88-03911
Distribution Limits
Public
Copyright
Other

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