Quantum-mechanical effects on low energy electron–ion Coulomb bremsstrahlung in dense high-temperature plasmas

Abstract

The low energy electron–ion Coulomb bremsstrahlung process is investigated in dense high-temperature plasmas including quantum-mechanical effects. An effective pseudopotential model taking into account both quantum-mechanical effects and plasma screening effects is applied to describe the electron–ion interaction potential in dense high-temperature plasmas. The straight-line trajectory method is applied to the motion of the projectile electron in order to investigate the variation of the bremsstrahlung radiation cross section as a function of the scaled impact parameter, thermal de Broglie wavelength, Debye length, projectile energy, and photon energy. The result shows that the quantum-mechanical effect reduces the bremsstrahlung radiation cross section in dense high-temperature plasmas. It is found that the quantum-mechanical effect is important for small impact parameters and more significant for the soft photon case.