Phys. Rev. A 9, 1143 - 1151 (1974)Measurement of the photoelectric cross section of H2 at 5.4 and 8.4 keV |
Bernd Crasemann, Paul E. Koblas *, Ta-Cheng Wang, Harvey E. Birdseye, and Mau Hsiung Chen
Department of Physics, University of Oregon, Eugene, Oregon 97403
Received 23 April 1973; revised 23 October 1973
The photoelectric cross section of molecular hydrogen has been measured by counting photoelectrons released by monochromatized x rays traversing highly purified H2 gas. Results are 54.0 ± 2.9 mb/atom at 5.41 keV and 12.0 ± 0.6 mb/atom at 8.39-keV incident-photon energy. The effect of molecular bonding is pronounced: The measured cross section, per atom, exceeds the theoretical atomic cross section by (44 ± 8)% at 5.41 keV and by (45 ± 7)% at 8.39 keV. A comparable effect has been predicted by Kaplan and Markin.
©1974 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v9/p1143
DOI: 10.1103/PhysRevA.9.1143
* Present address: Department of Physics, Delta College, University Center, Mich. 48710.
See Also
Comment: John W. Cooper, High-energy dependence of the molecular-hydrogen photoionization cross section, Phys. Rev. A 9, 2236 (1974)
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