Abstract
In contrast to the detailed investigations on the dosimetric electron trap in feldspar only little has been done to understand the luminescence centers. We use a comparison of multiple spectroscopic techniques, site selective photoluminescence spectroscopy and time resolved measurements to further our understanding of the luminescence mechanisms and recombination sites, in a sample of Na rich plagioclase feldspar (oligoclase). Both the UV and violet–blue emissions show resonant excitations arising from a distribution of energy levels. We propose, contrary to the general understanding, that the green emission may not arise from Mn2+ in our sample and that photoionisation of this centre may be possible by excitation to the band tail states. The deep red emission is tied to the Fe3+, and the exponential rise in the UV excitation efficiency of this centre is discussed in the context of the band-tail model.
Original language | English |
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Journal | Radiation Measurements |
Volume | 90 |
Pages (from-to) | 292-297 |
ISSN | 1350-4487 |
DOIs | |
Publication status | Published - 2016 |
Event | 9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation - Tartu, Estonia Duration: 20 Sept 2015 → 25 Sept 2015 Conference number: 9 |
Conference
Conference | 9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation |
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Number | 9 |
Country/Territory | Estonia |
City | Tartu |
Period | 20/09/2015 → 25/09/2015 |
Keywords
- Na-feldspar
- X-ray excited optical luminescence
- Radioluminescence
- Photoluminescence
- Band-tail model