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A Novel Algorithm For Calculating The Time Evolution Of The Electron Energy Distribution Function In Gaseous Discharges, P J. Drallos, J M. Wadehra
A Novel Algorithm For Calculating The Time Evolution Of The Electron Energy Distribution Function In Gaseous Discharges, P J. Drallos, J M. Wadehra
Physics and Astronomy Faculty Research Publications
We are presenting a novel numerical technique for obtaining the time evolution of the electron velocity and electron energy distribution functions in the presence of a uniform electric field. Using this technique, the various swarm parameters can be evolved for sufficiently long times so that equilibrium can be reached without incurring any numerical instabilities. Results are presented for electron swarms in gaseous neon for various values of E/N.
Formation Of Ground And Excited States Of Antihydrogen, Sultana N. Nahar, J M. Wadehra
Formation Of Ground And Excited States Of Antihydrogen, Sultana N. Nahar, J M. Wadehra
Physics and Astronomy Faculty Research Publications
Differential and integrated cross sections for the formation of antihydrogen by the impact of intermediate-energy (20–500 keV) antiprotons on positronium are calculated using the first Born approximation. The calculations are carried out for the formation of antihydrogen in ground and various excited electronic states (n=1–3) when positronium, the target atom, is in the ground state, and for the formation of antihydrogen in the ground state when the positronium is in various excited electronic states (n=1–2). The 1/n^3 behavior for the capture cross sections is used to calculate the total (that is, all states added together) integrated cross sections. The cross …