Absorptionsspektrum des Ce3+-Ions und Schwingungsspektrum im CeCl3·7H2O und CeCl3·7D2O |
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Authors: | N Haage K H Hellwege J Jäger Dr G Schaack |
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Institution: | 1. Institut für Technische Physik, Technischen Hochschule, Hochschulstra?e, D-6100, Darmstadt
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Abstract: | The absorption spectra of CeCl3·7 H2O, LaCl3·7 H2O, CeCl3·7 D2O and LaCl3·7 D2O have been measured at low temperatures in the region of the 4 f→4 f infrared transitions. The energy levels of the Ce3+-ion in these compounds have been derived. The infrared phonon transitions have also been determined from the reflection spectra of these crystals measured in the region between 4000 cm?1 and 50 cm?1. Some of the energy levels of the Ce3+-ions in the deuterated crystals are shifted for about 10 wavenumbers against those in CeCl3·7 H2O. These shifts are probably due to an interaction of the electronic levels with resonant phonon-states in one or the other of the two compounds. |
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