Abstract
FOURIER spectroscopy using polarisation1 and cube2,3 Michelson interferometers has made possible the study of the dispersion of aliphatic alcohols4,5 and water6 in the submillimetre waveband of the electromagnetic spectrum. Table 1 enumerates measurements we are reporting of refractive index n and absorption coefficient α; the most significant new alcohol and water data are displayed graphically in Fig. 1. The alcohol absorption bands seem to shift in frequency and broaden somewhat as the chain length increases. Alcohols show a monotonic fall of refractive index between 20 and 150 cm−1, but at higher frequencies it remains substantially frequency invariant. The individual dispersions arising from each absorption band cannot easily be discerned.
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CHAMBERLAIN, J., AFSAR, M., HASTED, J. et al. Dispersion of alcohols and water in the submillimetre waveband. Nature 255, 319–321 (1975). https://doi.org/10.1038/255319a0
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DOI: https://doi.org/10.1038/255319a0
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