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Appl Opt. 2016 Sep 01;55(25):7163-72. doi: 10.1364/AO.55.007163.

Ultraviolet (250-550  nm) absorption spectrum of pure water.

Applied optics

John D Mason, Michael T Cone, Edward S Fry

PMID: 27607297 DOI: 10.1364/AO.55.007163

Abstract

Data for the spectral light absorption of pure water from 250 to 550 nm have been obtained using an integrating cavity made from a newly developed diffuse reflector with a very high UV reflectivity. The data provide the first scattering-independent measurements of absorption coefficients in the spectral gap between well-established literature values for the absorption coefficients in the visible (>400  nm) and UV (<200  nm). A minimum in the absorption coefficient has been observed in the UV at 344 nm; the value is 0.000811±0.000227  m-1.

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