S. C. Mukherjee

Ionisation of Atomic Hydrogen Under Heavy Particle Impact

Ionisation of hydrogen atoms in ground and metastable 2s states by impact of protons and antiprotons has been studied at collision energies varying from 10 to 1566keV/amu. Total and double differential cross sections are calculated employing a final continuum state wave function which incorporates distortion due to the Coulomb fields of both the projectile and the target nuclei. The present calculated results are compared with the existing experimental findings as well as other theoretical predictions.

Calculation of cross sections for electron capture by fast fully stripped ions from atomic hydrogen

Charge transfer cross-sections in collisions of completely stripped ions of nuclear charges Zp = 3–8, 10 in the intermediate and high energy region with the gound state of atomic hydrogen are calculated within the framework of a single channel distorted wave approximation. Charge and velocity dependence of the nth partial cross-sections are studied. It is found that for a fixed projectile, nmax at which the n-th partial cross-section is maximum, moves towards smaller values as the energy increases. For a constant projectile velocity, nmax increases with the projectile charge. We have also studied the cross-sections of different sub-levels as a function of energy at n = nmax which is obtained from the nmax = Zp3/4 model for various projectiles. Comparisons are made with other calculations in the overlapping energy region.