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

1 Scopus citations


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
Issue number20
StatePublished - 29 Oct 2020
Externally publishedYes


  • double ionization,Migdal effect
  • neutron-impact


Dive into the research topics of 'Neutron ionization of helium near the neutron-alpha particle collision resonance'. Together they form a unique fingerprint.

Cite this