Low-energy positron collisions with water: elastic and rotationally inelastic scattering

K Baluja; Rui Zhang; Jan Franz; Jonathan Tennyson

doi:10.1088/0953-4075/40/17/018

Low-energy positron collisions with water: elastic and rotationally inelastic scattering

Abstract

Differential, integral and momentum transfer cross sections for the vibrationally elastic and rotationally inelastic scattering of positrons from water at low collision energy (E ≤ 10 eV) are reported. Several models within the R-matrix method are used to compute the body-fixed T-matrices, while the scattering calculations are performed within the fixed-nuclei approximation corrected with the standard Born-closure formula. These calculations are compared with experimental results for elastic scattering, and the best model gives reasonable agreement with the most recent measurements (Zecca et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 1597) but not with some earlier studies. The relative contribution of the rotationally inelastic processes is investigated and comparisons are made with the equivalent electron scattering cross sections.

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Authors (4)

K Baluja
- University of Delhi Department of Physics and Astrophysics
Rui Zhang
- University College London Department of Physics and Astronomy
Jan Franz dr hab.
- University College London Department of Physics and Astronomy
Jonathan Tennyson
- University College London Department of Physics and Astronomy

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS no. 40, edition 17, pages 3515 - 3524,
ISSN: 0953-4075
Language:: English
Publication year:: 2007
Bibliographic description:: Baluja K., Zhang R., Franz J., Tennyson J.: Low-energy positron collisions with water: elastic and rotationally inelastic scattering// JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. -Vol. 40, iss. 17 (2007), s.3515-3524
DOI:: Digital Object Identifier (open in new tab) 10.1088/0953-4075/40/17/018
Verified by:: Gdańsk University of Technology