Abstract
STUDIES of the near infra-red bands of diatomic sulphur (S2) showed1,2 that they form two systems of bands involving (a) 3IIg—3Δu and (b) 3IIg—3σ+u transitions with 3IIg being the common initial level for both the systems. Bands of the isotopic molecules, 32S 34S and 34S2 (in addition to 32S2), have now been obtained. Vibrational and rotational analyses of these bands confirm the observations of earlier studies2 and show that the emitter of the near infrared bands is the diatomic sulphur molecule. Further, the isotope shifts provide a correct vibrational assignment of the bands in both the systems. The results of these investigations are presented in this communication.
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References
Meakin, J. E., and Barrow, R. F., Canad. J. Phys., 40, 377 (1962).
Narasimham, N. A., and Sethuraman, V., Proc. Ind. Sci. Congress (1963).
Narasimham, N. A., Curr. Sci., 33, 261 (1964).
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NARASIMHAM, N., APPARAO, K. Isotope Shifts in the Near Infra-red Bands of Diatomic Sulphur. Nature 210, 1034–1035 (1966). https://doi.org/10.1038/2101034a0
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DOI: https://doi.org/10.1038/2101034a0
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