Ab initio R-matrix calculations of e+-molecule scattering

Details Ab initio R-matrix calculations of e+-molecule scattering Ab initio R-matrix calculations of e+-molecule scattering

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3058...91d&link_type=abstract

In NASA, Goddard Space Flight Center, Annihilation in Gases and Galaxies, NASA CP-3058 p 91-93 (SEE N90-18957 11-70)

Mathematics

Electron Scattering, Matrices (Mathematics), Molecular Collisions, Positrons, Scattering Cross Sections, Diatomic Molecules, Hydrogen, Molecular Excitation, Nitrogen, Oxygen

Scientific paper

The adaptation of the molecular R-matrix method, originally developed for electron-molecule collision studies, to positron scattering is discussed. Ab initio R-matrix calculations are presented for collisions of low energy positrons with a number of diatomic systems including H2, HF and N2. Differential elastic cross sections for positron-H2 show a minimum at about 45 deg for collision energies between 0.3 and 0.5 Ryd. The calculations predict a bound state of positronHF. Calculations on inelastic processes in N2 and O2 are also discussed.

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