Emission Spectra of Hot Dense Gases.

A rapid gas-compression technique for producing hot dense gases is evaluated as a means of extending the study of pressure effects on spectral lines to emission studies at high pressures. It is found that this new technique has a number of important advantages over the conventional absorption methods. Pressure-induced frequency shifts of a number of Cr and Fe lines are given as a function of the relative density of the perturbing rare gas. Violet satellite bands in emission at high pressures are reported for the first time.