Born Wave Cross-Section Calculations for Collisional Quenching of MetastableH(2s)by Helium, Neon, Argon, and Krypton
- 1 June 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 3 (6) , 1987-1991
- https://doi.org/10.1103/physreva.3.1987
Abstract
Total quenching cross sections for metastable atoms in collisions with helium, neon, argon, and krypton have been calculated over the incident-energy range 1.0 keV-1.6 MeV in the first Born approximation with the added approximation of closure used to describe target excitation. The first-Born-approximation cross sections for helium target atoms are one-third the measured values of Byron, Krotkov, and Medeiros over the incident-energy range 1.0-5.0 keV. The first-Born-approximation results for the heavier targets are much larger than experiment, although scaled results based on parameters determined from electron-loss data for show fair agreement with recent experiments. The contributions of individual quenching processes are examined, and electron loss dominates for incident energies greater than 4.0 keV.
Keywords
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