K CHAKRABARTI

Department of Mathematics, Scottish Church College, 1 & 3 Urquhart Square, Kolkata 700 006, India

Abstract.

Schwinger variational principle is used here to study large momentum transfer cases of electron and positron impact ionization of atomic hydrogen from the ground state at intermediate and moderately high energies. The results appear somewhat better compared to other theories.

Keywords:  Variational principle; ionization; cross section

Pacs Nos.  34.80.Dp; 34.85.+x