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Perturbations in the S2 Spectrum

Abstract

THE pressure effect on the predissociation of diatomic molecules is an experimentally well established phenomenon; but the detailed perturbation mechanism is not yet clear. In this communication, some new observations are reported on the well-known predissociation in the system of S2 (ref. 1). In absorption, the v″ progression shows, in pure sulphur vapour, a sudden intensity increase starting from v′ = 9. In the emission spectrum the v′ > 9 bands are missing. If a large amount of foreign gas is added to the absorbing vapour, new perturbations occur in the absorption spectrum, and in the emission2 spectrum the missing (v′ > 9) bands appear3.

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References

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HERMAN, L., HERMAN, R. Perturbations in the S2 Spectrum. Nature 197, 677 (1963). https://doi.org/10.1038/197677a0

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