Energy dependence of the (e,2 e) recoil peak to binary peak ratio across He (2 p 2) 1 D and (2 s 2 p) 1 P autoionizing levels

B. A. Deharak, K. Bartschat, N. L.S. Martin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The (e,2e) recoil peak to binary peak ratio as a function of the ejected-electron energy is reported for helium autoionizing levels (2p2)1D and (2s2p)1P. A special out-of-plane geometry is used where the ejected electrons are detected in a plane that includes the momentum transfer axis but is perpendicular to the scattering plane. The measured recoil peak to binary peak ratio is a dimensionless quantity that can be directly compared with calculations. A second-order model in the projectile-target interaction correctly reproduces the observed energy dependence and magnitude of the ratio, while a first-order model does not.

Original languageEnglish
Article number012702
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume89
Issue number1
DOIs
StatePublished - Sep 1 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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