Positron Impact Excitations Of Hydrogen Atom Under Lorentzian Astrophysical Plasmas

Publication Issue: 
Volume 39, Issue 2, 2018
Page No: 
Date Received: 
Tuesday, January 30, 2018
Authors' Name: 
B. Das
P. Rej
M. Z. M. Kamali
A. Ghoshal
Authors' Affiliation and Address: 
Department of Mathematics, Burdwan University, Golapbag, Burdwan 713 104, West Bengal, India
Department of Mathematics, Sarat Centenary College, Dhaniakhali, Hooghly-712 302, West Bengal, India
Centre for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
The excitations of hydrogen atom from its ground state due to positron impact under Lorentzian astrophysical plasma environments have been studied by applying a second order distorted wave theory which takes into account the effect of dipole polarization. Excitation cross sections are calculated as functions of the spectral index and plasma parameters for incident positron energies ranging from 20eV to 300eV. It is shown that the nonthermal effect of plasma significantly modifies the excitation cross sections.
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