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- W2162839557 abstract "Some recently published experimental absorption curves of small crystallites of NaI, KI. and MgO are shown to be in qualitative agreement with calculated absorption spectra of small spheres. Although the calculation allows for resonant, one phonon absorption only, it reproduces all the main features of the experimental data. It is shown that allowing for multiphonon processes has a very small effect on the calculated spectra. It follows that measurements on small samples are not a sensitive tool for obtaining information about multiphonon processes in the reststrahlen region. Vor kurzem veröffentlichte experimentelle Abeorptionskurven vonkleinenNaJ-, KJ- und MgO-Kristallen ergeben eine qualitative Übereinstimmung mit den für kleine Kugeln berechneten Absorptionsspektren. Obwohl die Berechnungen nur für Ein-Phonon-Absorption gültig sind, werden doch die hauptsächlichen Eigenschaften des Experiments gut wiedergegeben. Es wird gezeigt, daß die Einbeziehung von Mehr-Phonon-Prozessen eine sehrkleine Wirkung auf das berechnete Spektrum hat. Die Schlußfolgerung ist, daß Messungen, die an kleinen Partikeln durchgeführt werden, nicht ausreichen, um Informationen über Multi-Phononprozesse im Reststrahlengebiet zu erhalten." @default.
- W2162839557 created "2016-06-24" @default.
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- W2162839557 date "1973-11-01" @default.
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- W2162839557 title "One phonon versus multiphonon absorption in small ionic crystals" @default.
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- W2162839557 doi "https://doi.org/10.1002/pssb.2220600106" @default.
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