| Autor: |
Dmitry A. Spassky, Kiyoshi Shimamura, Marco Kirm, Sebastian Vielhauer, I.N. Shpinkov, G. Zimmerer, M. True, N.V. Shiran, Noboru Ichinose |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 537:291-294 |
| ISSN: |
0168-9002 |
| Popis: |
Reflection, excitation and luminescence spectra of as-grown and X-ray irradiated high-purity LiCaAlF 6 crystals were studied in the temperature range of 10–300 K using synchrotron radiation in VUV. The intrinsic luminescence of samples at 10 K consists of a non-elementary broad band with maximum at 4.4 eV under excitation at 11.45 eV. It is ascribed to the radiative decay of self-trapped excitons. The energy gap is estimated to be 12.65 eV in LiCaAlF 6 . Under interband excitation a red shift of luminescence was observed. The electron–hole recombination leads to the emission peaking at 3.7 eV. The excitation processes and origin of overlapping emissions of LiCaAlF 6 are discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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