Baluja, KL;
Zhang, R;
Franz, J;
Tennyson, J;
(2007)
Low-energy positron collisions with water: elastic and rotationally inelastic scattering.
J PHYS B-AT MOL OPT
, 40
(17)
3515 - 3524.
10.1088/0953-4075/40/17/018.
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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.
| Type: | Article |
|---|---|
| Title: | Low-energy positron collisions with water: elastic and rotationally inelastic scattering |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0953-4075/40/17/018 |
| Keywords: | R-MATRIX METHOD, ELECTRON-MOLECULE COLLISIONS, DIFFERENTIAL CROSS-SECTIONS, GAUSSIAN BASIS FUNCTIONS, ATOMIC BASIS SETS, FIRST-ROW ATOMS, POLYATOMIC-MOLECULES, CONTRACTION, EXCITATION, IMPACT |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/14412 |
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