Radiation absorption coefficients of polycrystalline ice from 400–1400 nm

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Abstract
Absorption coefficients have been measured for bubble‐free polycrystalline ice over the spectral region 400–1400 nm. In order to obtain an easily measurable attenuation at short wavelengths (400–500 nm), a 2.83 m block was used. The technique employed to grow large quantities of bubble‐free ice is presented in detail. The absorption coefficients agree very well with previous results in the infrared and appear to provide greater accuracy and spectral detail at visible wavelengths.