XUV spectra and soft X-ray laser wavelengths of 4f–4d transitions in $${\hbox{Ni}}^{+8}$$ Ni + 8

Abstract

For $$3p^{6}3\hbox {d}4l$$ where $$l=s, p, d, f$$ states in $$\hbox {Ni}^{+8}$$ , we evaluated both oscillator strengths and energy levels to investigate the probability of laser wavelengths production in the soft X-ray and XUV regions. The calculations are executed using CIV3 and LANL codes. By comparing the values of our results with other published experimental and theoretical data, a good match is achieved in addition to unpublished values of oscillator strengths and energy levels have been obtained. Using calculated oscillator strengths, the gain coefficients, and reduced populations have been calculated for $$\hbox {Ni}^{+8}$$ at different plasma temperatures, such as $$T = 1/4$$ the ionization potential energy (IP) of the $$\hbox {Ni}^{+8}$$ ; and the same thing for $$T = 1/2\ IP$$ and $$T = 3/4\ IP$$ . Promised values of positive laser gain are shown to obtain laser wavelengths in XUV and soft X-ray regions from current computed atomic data. Extreme ultraviolet radiation XUV is electromagnetic radiation in the part of the electromagnetic spectrum spanning wavelengths from 124 nm down to 10 nm.