Population Inversion and X-Ray Laser Gain by Electron Impact Excitation of Ni-Like Tin

摘要

Excitation energies and transition probabilities for the 1s~22s~22p~63s~23p~63d~(10), and the 1s~22s~22p~63s~23p~63d~94l (l= s, p, d, and f) configurations in nickel-like tin have been used to calculate the reduced population of 99 fine structure levels over a wide range of electron densities and at different electron plasma temperatures. The gain coefficients for those transitions with positive population inversion factors have been calculated as a function of electron density. This study is concerned with the transitions which produce positive gain at XUV and X-ray spectral regions.