Radioluminescence and photoluminescence of Th:CaF2 crystals
| Autor: | Matthias Schreitl, Simon Stellmer, Thorsten Schumm |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Multidisciplinary
Materials science Photoluminescence Physics - Instrumentation and Detectors Atomic Physics (physics.atom-ph) business.industry FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Radioluminescence Nuclear isomer Laser Thermoluminescence Article law.invention Physics - Atomic Physics law Optoelectronics Nuclear Experiment (nucl-ex) business Spectroscopy Luminescence Nuclear Experiment Radioactive decay |
| Zdroj: | Scientific Reports ResearcherID |
| ISSN: | 2045-2322 |
| Popis: | We study thorium-doped CaF$_2$ crystals as a possible platform for optical spectroscopy of the Th-229 nuclear isomer transition. We anticipate two major sources of background signal that might cover the nuclear spectroscopy signal: VUV-photoluminescence, caused by the probe light, and radioluminescence, caused by the radioactive decay of Th-229 and its daughters. We find a rich photoluminescence spectrum at wavelengths above 260 nm, and radioluminescence emission above 220 nm. This is very promising, as fluorescence originating from the isomer transition, predicted at a wavelength shorter than 200 nm, could be filtered spectrally from the crystal luminescence. Furthermore, we investigate the temperature-dependent decay time of the luminescence, as well as thermoluminescence properties. Our findings allow for an immediate optimization of spectroscopy protocols for both the initial search for the nuclear transition using synchrotron radiation, as well as future optical clock operation with narrow-linewidth lasers. 9 pages, 6 figures |
| Databáze: | OpenAIRE |
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