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Polarisation effects in low-energy positron–molecule scattering

✍ Scribed by J. Franz; K.L. Baluja; R. Zhang; J. Tennyson

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
166 KB
Volume
266
Category
Article
ISSN
0168-583X

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✦ Synopsis

The UK molecular R-matrix method has been adapted to treat positron collisions from polyatomic targets. A simple empirical enhancement factor which corrects for the underestimation of electron-positron polarisation and correlation effects in the calculations performed with the static-plus-polarization model at low scattering energies is presented. Application of this model to positron scattering from carbon dioxide at energies below 8 eV is discussed. Introduction of the enhancement factor improves the integral cross sections significantly and introduces structures in the differential cross sections consistent with other studies. The prospects for a fully ab initio treatment of this problem are discussed.

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