Calculation of emission–concentration and absorption–concentration relationships for spectral lines

Abstract

A general expression is derived for the calculation of total multiplet intensities for radiation emitted from a homogeneous source or transmitted through a homogeneous medium. The theory is then applied to the emission of radiation due to vibration–rotation transitions of HCl in an oven, and compared with experimental results. Absolute values of transition probabilities for individual vibration–rotation lines could be obtained by such a comparison. Another application of the theory is made in obtaining absorption–concentration relationships for the mercury 4358 Å line (73S1–63P1) with several different initial line shapes. The results are compared to absorption − 63P1 concentration curves used in earlier work.