Dynamic screening effects on the electron-impact excitation in Lorentzian (kappa)-Maxwellian plasmas

The electron-impact excitation process in the kappa-Maxwellian plasma is investigated by using the dynamically screened interaction potential. The scaled transition probability for the 1s→2p0 excitation is obtained by the semiclassical trajectory analysis with the plasma dielectric function as a function of impact parameter, collision energy, Debye length, and spectral index. The nonthermal and plasma screening effects on the excitation probability are more significant when the electron velocity related to the parallel temperature is greater than the projectile velocity, and the transition probability increases with decreasing nonthermal character of the plasma