Spectroscopic quantitative analysis of the isotopic composition of gas mixtures containing hydrogen, deuterium, and tritium

A detailed experiment is carried through to construct a calibrating curve in the concentration interval from 0.7 to 97% H₂ in D₂. The results obtained are in good agreement with theory. It is shown that it is possible to perform an isotopic analysis of tritium in mixtures with hydrogen and deuterium. An investigation is performed of the relative intensity of the isotope lines as a function of the pressure in a discharge tube.