The x-ray emission spectra of multicharged xenon ions in a gas puff laser-produced plasma

Emission spectra of multicharged xenon ions produced by a laser gas puff are observed with high spectral resolution in the 8.5-9.5 and 17-19 Å wavelength ranges. Three different theoretical methods are employed to obtain 3l-n′l′ (n′ = 4 to 10) wavelengths and Einstein coefficients for Ni-like Xe²⁶⁺. For the 3d-4p transitions, very good agreement is found between the experimental wavelengths and the various theoretical wavelengths. These accurate energy level measurements can be useful for studying the Ni-like xenon x-ray laser scheme. On the other hand, several intense spectral lines could not be identified as 3l-n′l′ lines of Ni-like xenon, despite the very good agreement between the wavelengths and Einstein coefficients calculated for these transitions using the three different methods.