Auger decay of neon following energetic ion bombardment

Dennis L Matthews, B. M. Johnson, J. J. MacKey, L. E. Smith, W. Hodge, C. Fred Moore

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

A high-resolution double-focusing electrostatic electron analyzer has been used to resolve Ne Auger electrons produced by 0.15-6.0-MeV H+, 1.0-MeV He+, and 33-MeV 05+ bombardment. Individual K-Auger satellite lines stemming from the decay of multiply ionized neon have been observed. The energies, relative intensities, and production probabilities of these satellite lines were measured as a function of the projectile Z and as a function of proton bombarding energy. Tentative identifications for all observed lines were made by comparison with calculated Auger satellite transition energies. The reliability of the Hartree-Fock calculations used was demonstrated by comparison with e-+Ne data and by comparing calculated x-ray transition energies for multiply ionized neon to recent measurements of O + Ne x-ray lines. A rough estimate of the probability of single- and double-2s orbital vacancy production as a function of L-shell defect was obtained. With proton bombardment, the satellite-production probability Qs was observed to decrease smoothly with increasing proton energy. The observation that Qs for 6-MeV proton bombardment was approximately equal to that obtained with equal-velocity electrons is believed to imply that electron shakeoff is the dominant L-shell ionization mechanism for high-energy proton bombardment.

Original languageEnglish (US)
Pages (from-to)1177-1187
Number of pages11
JournalPhysical Review A
Volume10
Issue number4
DOIs
StatePublished - 1974
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

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    Matthews, D. L., Johnson, B. M., MacKey, J. J., Smith, L. E., Hodge, W., & Moore, C. F. (1974). Auger decay of neon following energetic ion bombardment. Physical Review A, 10(4), 1177-1187. https://doi.org/10.1103/PhysRevA.10.1177