Modelling of the Ni-like and Co-like line emission from Ni-like Silver X-ray laser media

摘要

We have modelled the Ni-like and Co-like resonance lines emitted from Ni-like Silver X-ray laser media using a collisional radiative code. The code calculates intensities of Ni-like 1s(2)2s(2)2p(6)3s(2)3p(6)3d(10) --> 1s(2)2s(2)2p(6)3s(2)3p(6)3d(9) nl, Co-like 1s(2)2s(2)2p(6)3s(2)3p(6)3d(9) --> 1s(2)2s(2)2p(6)3s(2)3p(6)3d(8) nl resonance lines emitted from silver. Intensities of photons emitted between Ni-like 1s(2)2s(2)2p(6)3s(2)3p(6)3d(9) n'l' --> 1s(2)2s(2)2p(6)3s(2)3p(6)3d(9) nl and Co-like 1s(2)2s(2)2p(6)3s(2)3p(6)3d(8) n'l' --> 1s(2)2s(2)2p(6)3s(2)3p(6)3d(8) nl excited levels are also calculated. The optimum electron temperature and density for J = 0 - 1 lasing at 13.9 nm is evaluated. The ratios of Co-like 3d-4p to Ni-like 3d-4p resonance lines are calculated with the aim that such ratios can serve as a diagnostic to measure electron temperatures.