Theoretical research in atomic physics

Professor Jogindra M. Wadehra

The emphasis of our work is on studying the scattering of positrons (antiparticles of electrons) and electrons from various atoms and molecules.

The systems under current investigation include rare gas atoms, alkali atoms, and light molecules. We have also calculated and compared the cross sections for the ionization of inner shells of various atoms by the impact of both positrons and electrons.

Other research interests include investigations of the production of negative ions by the process of dissociative electron attachment to simple molecules. The rates of negative ion production by this process are strongly enhanced if the attaching molecule is initially rovibrationally excited.

We have also calculated the cross sections for the vibrational excitation and dissociation of simple molecules by electron impact. Atomic and molecular collision processes play important and significant roles in astronomy and astrophysics.