Young-type interference effect on angular distribution of secondary electrons emittedfrom H2 in collisions with fast electrons

SHYAMAL CHATTERJEE; S KASTHURIRANGAN; A H KELKAR; C R STIA; OMAR ARIEL FOJON; ROBERTO D RIVAROLA; L C TRIBEDI

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

American Physical Society

Lugar: New York; Año: 2008 vol. 58 p. 52701 - 52701

1050-2947

   The Young-type interference arising due to the spatial coherence has been investigated in the electron emission spectrum from fast electron impact ionization of the inversion symmetric homonuclear diatomicmolecule H2. The evidence of the interference effect in the angular distribution of the double differential spectrum of the secondary electron is found. The signature of constructive interferences has been identified in the soft-collision regions as well as in binary encounters. The observed oscillation in the forward-backward asymmetry parameter is explained in terms of the Cohen-Fano-type interference coupled with the angular dependence of oscillation frequency. A comparative study indicates a marked difference between the angularasymmetry in the case of fast heavy ion F9+ and electron collisions with H2 at a similar velocity.