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Classical bremsstrahlung radiation from electron–ion encounters in a nonideal plasma

Published online by Cambridge University Press:  17 June 2002

YOUNG-DAE JUNG
Affiliation:
Department of Physics, 0319, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0319, USA Department of Physics, Hanyang University, Ansan, Kyunggi-Do 425-791, South Korea ([email protected]; [email protected])
CHANG-GEUN KIM
Affiliation:
Department of Physics, Hanyang University, Ansan, Kyunggi-Do 425-791, South Korea ([email protected]; [email protected])

Abstract

The classical electron–ion Coulomb bremsstrahlung process is investigated in a nonideal plasma. An effective pseudopotential model taking into account plasma-screening and collective effects is applied to describe the electron-ion interaction potential in a nonideal plasma. The screened hyperbolic-orbit trajectory method is applied to the motion of the projectile electron in order to investigate the bremsstrahlung radiation cross-section as a function of the scaled impact parameter, eccentricity, nonideal-plasma parameter, Debye length, projectile energy, and photon energy. It is found that the collective effect reduces the bremsstrahlung radiation cross-section on both the soft- and hard-photon cases. For small impact parameters, the nonideal-plasma effect on the bremsstrahlung radiation cross-section is found to be quite small. It is also found that the maximum position of the bremsstrahlung radiation cross-section gets closer to the target ion with increasing nonideal-plasma effect.

Type
Research Article
Copyright
2002 Cambridge University Press

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