Detailed comparison of experimental and theoretical heliumlike Ti and Ca satellite line spectra emitted from a laser-produced plasma

Time- and space-integrated x-ray spectra of heliumlike titanium (Ti XXI) and heliumlike calcium (Ca XIX), resonance, and satellite lines emitted from a laser-produced plasma during a study of Li-like x-ray lasing have been observed with a LiF (2d=4.027 Angstrom) crystal spectrometer and compared to model calculations of the spectra. We show that the emission can be accurately calculated for critical and subcritical density laser-produced plasmas assuming coronal equilibrium and that published atomic data for these satellite lines produce good agreement with the observed spectra. The He-like Ca and Ti intercombination to jkl Li-like satellites intensity ratios are proposed as useful and accurate diagnostics of electron temperatures in laser-produced plasmas for temperatures above 0.5 keV.