Landau damping effects on the low-energy bremsstrahlung process in a quantum plasmaHwa-Min Kim1 and Young-Dae Jung2
1 Department of Electronics Engineering, Catholic University of Daegu, Hayang, Gyongsan, Gyungbuk 712-702, South Korea
2 Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 426-791, South Korea
received 9 October 2006; accepted in final form 13 March 2007; published May 2007
published online 5 April 2007
The Landau damping effects on the low-energy bremsstrahlung process are investigated for both the soft- and hard-photon radiations in a quantum plasma composed of electrons and holes. The impact parameter method is applied to the motion of the projectile in order to investigate the variation of the bremsstrahlung cross-section as a function of the effective Debye length, impact parameter, and radiation photon energy. The results show that the Landau damping effects significantly enhance the bremsstrahlung radiation cross-section. It is important to note that the domain of the Landau damping effects is extended with increasing the radiation photon energy.
52.20.-j - Elementary processes in plasmas.
© Europhysics Letters Association 2007