التفاصيل البيبلوغرافية
| العنوان: |
Advanced spectroscopic investigation of colour centres in LiF crystals irradiated with monochromatic hard x-rays |
| المؤلفون: |
Vincenti, M A, Montereali, R M, Bonfigli, F, Nichelatti, E, Nigro, V, Piccinini, M, Koenig, M, Mabey, P, Rigon, G, Dabrowski, H J, Benkadoum, Y, Mercere, P, Da Silva, P, Pikuz, T, Ozaki, N, Makarov, S, Pikuz, S, Albertazzi, B |
| المساهمون: |
Japan Society for the Promotion of Science, ENEA |
| المصدر: |
Journal of Physics: Condensed Matter ; volume 36, issue 20, page 205701 ; ISSN 0953-8984 1361-648X |
| بيانات النشر: |
IOP Publishing |
| سنة النشر: |
2024 |
| الوصف: |
Nominally-pure lithium fluoride (LiF) crystals were irradiated with monochromatic hard x-rays of energy 5, 7, 9 and 12 keV at the METROLOGIE beamline of the SOLEIL synchrotron facility, in order to understand the role of the selected x-ray energy on their visible photoluminescence (PL) response, which is used for high spatial resolution 2D x-ray imaging detectors characterized by a wide dynamic range. At the energies of 7 and 12 keV the irradiations were performed at five different doses corresponding to five uniformly irradiated areas, while at 5 and 9 keV only two irradiations at two different doses were carried out. The doses were planned in a range between 4 and 1.4 × 10 3 Gy (10.5 mJ cm −3 to 3.7 J cm −3 ), depending on the x-ray energy. After irradiation at the energies of 7 and 12 keV, the spectrally-integrated visible PL intensity of the F 2 and F 3 + colour centres (CCs) generated in the LiF crystals, carefully measured by fluorescence microscopy under blue excitation, exhibits a linear dependence on the irradiation dose in the investigated dose range. This linear behaviour was confirmed by the optical absorption spectra of the irradiated spots, which shows a similar linear behaviour for both the F 2 and F 3 + CCs, as derived from their overlapping absorption band at around 450 nm. At the highest x-ray energy, the average concentrations of the radiation-induced F, F 2 and F 3 + CCs were also estimated. The volume distributions of F 2 defects in the crystals irradiated with 5 and 9 keV x-rays were reconstructed in 3D by measuring their PL signal using a confocal laser scanning microscope operating in fluorescence mode. On-going investigations are focusing on the results obtained through this z -scanning technique to explore the potential impact of absorption effects at the excitation laser wavelength. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| DOI: |
10.1088/1361-648x/ad2796 |
| DOI: |
10.1088/1361-648X/ad2796 |
| DOI: |
10.1088/1361-648X/ad2796/pdf |
| الإتاحة: |
https://doi.org/10.1088/1361-648x/ad2796Test |
| حقوق: |
http://creativecommons.org/licenses/by/4.0Test ; https://iopscience.iop.org/info/page/text-and-data-miningTest |
| رقم الانضمام: |
edsbas.1EFBE061 |
| قاعدة البيانات: |
BASE |
