On the S0(0) and S1(0) spectra of the H2-H2dimer

The authors present computed frequencies of the S 0 (0) transitions between bound and pseudo-bound levels of the para-H 2 -para-H 2 dimer. The calculations account for the interchange symmetry of the H 2 molecules. Analogous calculations of the S 1 (0) spectrum and found to be in satisfactory agreement with the laboratory measurements of McKellar and Welsh (1974). The authors' results lend support to the proposed identification of features in the far infrared spectra of Jupiter and Saturn with S 0 (0) transitions of the H 2 -H 2 dimer.