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Ein Polarisations-Spectralphotometer für Emissions- und Absorptionsmessungen an kleinen Einkristallen bei tiefer Temperatur

Yersin, Hartmut ; Gliemann, G.


Abstract

A micro-spectrophotometer is described allowing the measurement of absorption and emission spectra of very small oriented single-crystals in polarized light. The faint emission intensity requires a well linked up micro-optical system. The low signal-current makes it necessary to count photons and to cool simultaneously the photomultiplier. For cooling of the single-crystals a helium evaporation ...

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