Issue
EPL
Volume 78, Number 3, May 2007
Article Number 35001
Number of page(s) 4
Section Physics of Gases, Plasmas and Electric Discharges
DOI http://dx.doi.org/10.1209/0295-5075/78/35001
Published online 05 April 2007
EPL, 78 (2007) 35001
DOI: 10.1209/0295-5075/78/35001

Landau damping effects on the low-energy bremsstrahlung process in a quantum plasma

Hwa-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

ydjung@hanyang.ac.kr
yjung@hanyang.ac.kr

received 9 October 2006; accepted in final form 13 March 2007; published May 2007
published online 5 April 2007

Abstract
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.

PACS
52.20.-j - Elementary processes in plasmas.

© Europhysics Letters Association 2007