Non-thermal effects on the soft-photon transition bremsstrahlung radiation due to polarization interactions in generalized Lorentzian plasmas

The non-thermal effects on the soft-photon transition bremsstrahlung radiation due to the interaction between the electron and the polarized Debye sphere are investigated in generalized Lorentzian plasmas. The impact parameter method with the effective interaction potential taking into account the non-thermal character is applied to obtain the bremsstrahlung radiation cross section as a function of the impact parameter, Debye length, photon energy, projectile energy and spectral index of the generalized Lorentzian plasma. It is shown that the non-thermal effects enhance the maximum value of the bremsstrahlung radiation cross section. It is also found that the non-thermal effects increase the bremsstrahlung radiation cross section. In addition, it is shown that the non-thermal effect on the bremsstrahlung radiation cross section decreases with increasing Debye length.One of the authors (Y-DJ) thanks Dr M Rosenberg for useful discussions and warm hospitality while visiting the University of California, San Diego. The authors would like to thank the anonymous referees for suggesting improvements to the text. This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No 2010-0015910)