Inclusion of UTA widths in the Configurationally Resolved Super-Transition-Arrays (CRSTA) method

The mathematical machinery of the CRSTA method (G. Hazak and Y. Kurzweil, High Energy Density Physic, 8, 290 (2012)), for evaluation of radiation absorption spectrum in hot dense plasmas is extended to include the effect of the UTA widths. An extended generating function is presented which enables the evaluation of the analytical sum of Gaussian UTA spectra. A numerical example is presented.