Ultraviolet (250-550nm) absorption spectrum of pure water.
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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 (>400nm) and UV (<200nm). A minimum in the absorption coefficient has been observed in the UV at 344 nm; the value is 0.0008110.000227m-1.