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Collisional Quenching of Metastable Hydrogen Atoms

J. Chem. Phys. 55, 926 (1971); doi:10.1063/1.1676163

Issue Date: 15 July 1971

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C. A. Slocomb and W. H. Miller
Inorganic Materials Research Division of the Lawrence Radiation Laboratory and the Department of Chemistry, University of California, Berkeley, California 94720

H. F. Schaefer III
Department of Chemistry, University of California, Berkeley, California 94720
Quenching of metastable hydrogen atoms by low energy collisions with atoms and molecules is considered, the actual process being H(2s)+X-->H(2p)+X. The Born approximation, with long-range multipole–multipole interactions, is used to describe collisions of H(2s) with molecules, and simple formulas for the cross section result. Collisions with spherically symmetric species (i.e., rare gas atoms) are treated in the adiabatic approximation, and the process is seen to be formally identical to symmetric charge transfer. Numerical results for collisional quenching by helium, based on accurately computed potential curves, are presented. ©1971 American Institute of Physics
History: Received 24 February 1971
Permalink: http://link.aip.org/link/?JCPSA6/55/926/1
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ISSN:
0021-9606 (print)   1089-7690 (online)
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REFERENCES (27)
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  7. If X* is an ionized slate, X++e−, however, the process can be exactly resonant [Eq. 2(b) would then be an example of Penning ionization] and thus have an appreciable cross section; for this to be possible the collision partner X must have an ionization potential less than 10.2 eV.
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