Complete direct method for electron-hydrogen scattering: Application to the collinear and Temkin-Poet models

Bartlett, P.L. and Stelbovics, A.T. (2004) Complete direct method for electron-hydrogen scattering: Application to the collinear and Temkin-Poet models. Physical Review A - Atomic, Molecular, and Optical Physics, 69 (2).

Abstract

We present an efficient generalization of the exterior complex scaling (ECS) method to extract discrete inelastic and ionization amplitudes for electron-impact scattering of atomic hydrogen. This fully quantal method is demonstrated over a range of energies for the collinear and Temkin-Poet models and near-threshold ionization is examined in detail for singlet and triplet scattering. Our numerical calculations for total ionization cross sections near threshold strongly support the classical threshold law of Wannier [Phys. Rev. 90, 817 (1953)] (σ∝E1.128±0.004) for the L=0 singlet collinear model and the semiclassical threshold law of Peterkop [J. Phys. B 16, L587 (1983)] (σ∝E3.37±0.02) for the L=0 triplet collinear model, and are consistent with the semiclassical threshold law of Macek and Ihra [Phys. Rev. A 55, 2024 (1997)] (σ∝exp[(-6.87±0.01)E-1/6]) for the singlet Temkin-Poet model.

Item Type:	Journal Article
Murdoch Affiliation(s):	Centre for Atomic, Molecular and Surface Physics
Publisher:	The American Physical Society
Copyright:	© 2004 The American Physical Society
URI:	http://researchrepository.murdoch.edu.au/id/eprint/10574

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