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Open Access Publications from the University of California

Recoil ion charge state distribution following the beta(sup +) decay of {sup 21}Na

  • Author(s): Scielzo, Nicholas D.
  • Freedman, Stuart J.
  • Fujikawa, Brian K.
  • Vetter, Paul A.
  • et al.

The charge state distribution following the positron decay of 21Na has been measured, with a larger than expected fraction of the daughter 21Ne in positive charge states. No dependence on either the positron or recoil nucleus energy is observed. The data is compared to a simple model based on the sudden approximation. Calculations suggest a small but important contribution from recoil ionization has important consequences for precision beta decay correlation experiments detecting recoil ions.

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