Document Type

Article

Publication Date

2015

DOI

10.1103/PhysRevA.91.012706

Publication Title

Physical Review A

Volume

91

Issue

1

Pages

012706 (1-9)

Abstract

The triple differential cross section for ionization of the inert gases He, Ne, Ar, Kr, and Xe in energy-sharing perpendicular plane geometry is investigated. Encouraging agreement with recent experiments is found using the distorted-wave Born approximation (DWBA). Mechanisms are discussed which explain the He and Ne data but which seem to be masked by the greater distortion effects in the heavier targets. The inclusion of postcollisional interaction is explored using Gamow, Nee, and Ward-Macek, Mee, factors. While both help to improve the shape of the cross section for He and Ne at the lower energies, they are not successful for the other targets, and both factors prove to be too strong for all the inert gases with increasing impact energy. It is well known that Nee destroys normalization. Comparing DWBA + Mee results with some absolute experimental points at 1 and 2 eV indicates that it is also not to be trusted on normalization. An interesting situation with Ar is highlighted near 25 eV, where the cross section may be tending towards a strong interference minimum or zero.

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Comments

PACS number(s): 34.80.Dp, 34.10.+x

Original Publication Citation

Miller, F. K., Walters, H. R. J., & Whelan, C. T. (2015). Energy-sharing (e,2e) collisions: Ionization of the inert gases in the perpendicular plane. Physical Review A, 91(1), 1-9, Article 012706. https://doi.org/10.1103/PhysRevA.91.012706

ORCID

0000-0002-3816-2799 (Whelan)

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