Abstract

The spectral thermal emission of small alkalihalide crystalś (1–3μm diameter) grown on a gold substrate by vacuum deposition has been measured in the far infrared (40–100μm) at temperatures between 80 and 600°K. Resonances resulting from vibrational bulk and surface modes have been observed. A new technique for the measurement of the emissivity of opaque materials without using a black body reference source is mentioned.

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