Electron capture by metastable projectiles on He and Ne

J. Newcomb, T. R. Dillingham, James Hall, S. L. Varghese, Philip L. Pepmiller, Patrick Richard

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15 Scopus citations


Electron capture to n2 levels of F7+ (1s 2s)S3 projectiles lead to three-electron ions with an energetically allowed K-Auger decay channel. We have measured the F K-Auger emission spectra for collisions with thin gas targets of He and Ne with sufficiently high resolution to distinguish capture to several of the low-lying n values. The K-Auger production cross sections are reported as a function of the n level into which the electron is captured. The n-level dependence is measured for projectile energies of 6, 9, 12, and 15 MeV and is compared to the Oppenheimer-Brinkman-Kramers OBK model for charge transfer and to a 1n3 function. The measured K-Auger electron-production cross sections closely follow the 1n3 function which differs from the predicted OBK n dependence, even though the cross sections for the higher n levels agree with the predicted OBK energy dependence. The effects of cascading upon the calculated n dependence are also studied.

Original languageEnglish (US)
Pages (from-to)82-91
Number of pages10
JournalPhysical Review A
Issue number1
StatePublished - 1984

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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