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Absolute measurement of the photoionization cross section of atomic hydrogen with a shock tube for the extreme ultravioletThe paper reports an experiment which is part of a program to measure the absolute values of the atomic photoionization cross sections of astrophysically abundant elements, particularly in stars and planetary atmospheres. An aerodynamic pressure-driven shock tube constructed from stainless steel with a quadratic cross section was used to measure the photoionization cross section of H I at 19 wavelength points from 910 to 609 A with experimental uncertainties between 7 and 20%. The shock tube was used to produce fully dissociated hydrogen and neon mixtures for the photoabsorption measurements.
Document ID
19760049892
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Palenius, H. P.
(Harvard Coll. Observatory Cambridge, MA, United States)
Kohl, J. L.
(Harvard Coll. Observatory Cambridge, MA, United States)
Parkinson, W. H.
(Harvard College Observatory and Smithsonian Astrophysical Observatory Cambridge, Mass., United States)
Date Acquired
August 8, 2013
Publication Date
May 1, 1976
Publication Information
Publication: Physical Review A - General Physics
Subject Category
Astrophysics
Accession Number
76A32858
Funding Number(s)
CONTRACT_GRANT: NGL-22-007-006
Distribution Limits
Public
Copyright
Other

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