Neutron-Impact Ionization of H and He

POSTER

Abstract

Perturbative distorted-wave and non-perturbative close-coupling methods are used to study neutron-impact ionization of H and He. For single ionization of H, we find excellent agreement between the distorted-wave and close-coupling results at all incident energies. For double ionization of He, we find poor agreement between the distorted-wave and close-coupling results, except at the highest incident energies. We present the ratio of double to single ionization for He as a guide to experimental checks of theory at low energies and experimental confirmation of the rapid rise of the ratio at high energies.

*This work was supported in part by grants from NSF and US DoE. Computational work was carried out at NERSC in Oakland, California, NICS in Knoxville, Tennessee, and OLCF in Oak Ridge, Tennessee.

Authors

  • T.-G. Lee

    • Department of Physics, Auburn University, Auburn, Alabama 36849, USA

  • M.F. Ciappina

    • Department of Physics, Auburn University, Auburn, Alabama 36849, USA

  • F. Robicheaux

    • Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA

  • M.S. Pindzola

    • Department of Physics, Auburn University, Auburn, Alabama 36849, USA