P H Y S IC S C O LLO QUIUM IN A TOMIC A ND MOLECULAR SCIENCE by Prof. Ghanshyam Purohit Calculation of TDCS (Triply Differential Cross Section) for the electron impact ionization of xenon atoms Time: 13:45  Monday, Oct. 22, 2012

Location: Sophia Univ. L-921

The study of charged particle (electron / positron / ion / proton) impact ionization of atoms, ions and molecules has been of interest, since the early days of atomic and molecular physics. Recently Purohit et al. [1] reported the results of TDCS for the perpendicular plane ionization of Ne and Ar atoms in the modified distorted wave Born approximation formalism.  We report in this communication the triple–differential cross section (TDCS) results of Xe atoms for low energy (e, 2e) ionization at the incident electron energies 20 eV and 40 eV above the ionization threshold from coplanar to perpendicular plane geometries.  We have performed the calculation of TDCS including the second Born term in the Born approximation.  We will compare the results of TDCS calculated in the first as well as second Born approximation. We will also discuss the effect of post collision interaction in coplanar to perpendicular plane geometrical conditions. We will compare the result of our calculation for Xe with the very recent measurements of Nixon and Murray [2].

Prof. Ghanshyam Purohit Department of Physics, School of Engineering, Sir Padampat Singhania University, Bhatewar, Udaipur-313 601, India

References [1] G. Purohit, Prithvi Singh, Vinod Patidar, Y. Azuma, and K. K. Sud, Phys. Rev. A   85, 022714 (2012) [2] K. L. Nixon and A. J. Murray, Phys. Rev. A 85, 022716 (2012)

Former visiting professor at Sophia University e-mail: [email protected]

Contact:  Yoshiro AZUMA   [email protected]