ISOPOTOMER ABSORPTION SPECTRAL ANALYZER AND ITS METHOD

摘要

An isopotomer absorption spectral analyzer and its method for precisely measuring the isotope ratio by substantially equalizing the absorption signal levels of different isotope species. In an isotopomer absorption spectral analyzer, a sample cell (21) where optical paths of different optical lengths can be provided is installed, optical beams A, B are made to enter the sample cell (21) and travel along paths of different optical lengths, thereby determining the isotope abundance in molecules from the ratio of strength between the absorption signals.