Fermi Diad 10°0 and 02°0 of Nitrous Oxide

Measurement of the fine structure of the bands ν1 and 2ν20 of nitrous oxide has led to an evaluation of the centrifugal stretching constants of the Fermi diad 10°0 and 02°0. It was found that as compared to the value in the ground state, the change in the centrifugal stretching constant of the 02°0 level is much more than in the 10°0 level. This result has been discussed in relation to the theory of Nielsen, Amat, and Goldsmith (1956). The following revised values have been obtained for some of the molecular constants of N214O16:[Formula: see text]