Neutron ionization of helium near the neutron-alpha particle collision resonance

M. S. Pindzola, J. Colgan*, M. F. Ciappina

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Neutron-impact single and double ionization cross sections of the He atom are calculated near the neutron-alpha particle collision resonance. Calculations using the time-dependent close-coupling method for total and differential cross sections are made at 8 incident neutron energies ranging from 250 to 2000 keV. At the resonance energy peak the double ionization cross sections unexpectedly become larger than the single ionization cross sections. This finding appears to be related to the high velocity of the recoiling alpha particle, which makes it unlikely that the atomic electrons can recombine with the alpha particle nucleus, enhancing the double ionization cross section.

Original languageEnglish
Article number205201
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume53
Issue number20
DOIs
StatePublished - 29 Oct 2020
Externally publishedYes

Keywords

  • double ionization,Migdal effect
  • neutron-impact

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