Electron-atom superelastic scattering in magnesium at millielectron volt energies

T. Baynard, A. C. Reber, R. F. Niedziela, S. A. Darveau, B. Prutzman, R. S. Berry

Research output: Contribution to journalArticle

Abstract

The energy dependence of superelastic scattering is measured for electrons on Mg(31P) from threshold to 270 meV with a novel technique. The method uses photoelectrons produced by a narrow bandwidth laser as an approximately monoenergetic incident electron source to collide with excited atoms. Measurements are made at energies as low as 1.5 meV with a resolution of 1 meV near threshold. An efficient magnetic-bottle time-of-flight electron spectrometer allows for the simultaneous measurement of multiple scattering channels. Above-threshold ionization is also observed. The measured energy dependence for transitions from the VP state to both the 33P and 31S are found to be inversely proportional to the energy from 10 to 270 meV. Below 10 meV, the dependencies are different, with the 33P transition having an E-1/2 dependence and the 31S channel retaining an E-1 dependence.

Original languageEnglish (US)
Pages (from-to)12487-12494
Number of pages8
JournalJournal of Physical Chemistry A
Volume111
Issue number49
DOIs
StatePublished - Dec 13 2007

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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    Baynard, T., Reber, A. C., Niedziela, R. F., Darveau, S. A., Prutzman, B., & Berry, R. S. (2007). Electron-atom superelastic scattering in magnesium at millielectron volt energies. Journal of Physical Chemistry A, 111(49), 12487-12494. https://doi.org/10.1021/jp075583e