| Autor: |
S. Neicheva, N.V. Shiran, Y. Boyarintseva, A.V. Gektin, Kiyoshi Shimamura, Encarnación G. Víllora, Gregory Stryganyuk |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Journal of Luminescence. 129:1542-1545 |
| ISSN: |
0022-2313 |
| Popis: |
The spectral and kinetic parameters of LiCaAlF 6 :Pr and LiSrAlF 6 :Pr single crystals are studied at LHeT and room temperature (RT). Photon cascade emission (PCE), i.e., 1 S 0 → 1 I 6 and 3 P 0 → 3 H j , 3 F j transitions after Pr 3+ excitation via 4f 2 →4f 5d absorption results in the conversion of the vacuum ultraviolet photon to two visible photons. The excitation and photoemission spectra as well as decay times have been measured and compared with those for CaF 2 :Pr and SrF 2 :Pr crystals. X-ray luminescence was measured to study the emission origin from both 1 S 0 and 3 P 0 states of Pr 3+ . An intense phosphorescence of LiSrAlF 6 :Pr was observed in the visible range after X-irradiation at RT, contrary to LiCaAlF 6 :Pr. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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