Abstract

It is difficult to explain continuity between¹²C¹⁶O₂−¹²C¹⁶O₂−¹²C¹⁸O₂ laser oscillation spectra due to only oxygen isotope–mass–difference (¹⁶O, ¹⁸O) effect on rotation energy level of fine structure for 00°1 to 10°0 of transition of CO₂ molecules. In order to explain fine structure interval of CO₂ laser oscillation spectra, it is necessary to consider CO₂ molecule shape of smaller O=C bond length (this means smaller rotation inertia moment of a CO₂ molecule) through nuclear characteristics (for example, gravity center, shape, spin) in a CO₂ molecule.

© 1993 Optical Society of America