Anomalous thermal stability of the [GeO4]- Electron Paramagnetic Resonance signal and the 110 °C Thermally Stimulated Luminescence peak in natural and synthetic quartz

Monti, Andrea Maurizio; Buryi, M.; Fasoli, M.; Martini, M.

doi:10.1016/j.jlumin.2021.118263

Cited by 5 publications

(2 citation statements)

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“…This emission is compatible with the one from the WR-TL experiment reported in our previous paper on Q_LS. The time needed for this emission to disappear (around 1 h at RT) is also consistent with previous decay measurements of the so called "110 • C TL peak of quartz" [26,27]. This emission is unrelated to any of the components observed in Figure 1 and is not PL active in the studied excitation range.…”

Section: Discussionsupporting

confidence: 91%

“…Line scans were acquired on sample surface using a scan speed of 3 µm/s, a spot size of 65-80 µm, a frequency of 10 Hz, a fluence of ~6 J/cm 2 , and an He flux of 0.6 L/min. The following isotopes (m/z) were acquired: 7 Li, 27 Al, 29 Si, 48Ti, 73 Ge, 74 Ge, 139 La, 140 Ce, 147 Sm, 153 Eu, 172 Yb, 232 Th, and 238 U. Data reduction was performed following Longerich et al (1996) [24] and using NIST612 glass as external reference material.…”

Section: Methodsmentioning

confidence: 99%

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Unusual Luminescence of Quartz from La Sassa, Tuscany: Insights on the Crystal and Defect Nanostructure of Quartz Further Developments

et al. 2022

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Quartz luminescence finds applications on many fields, but much work still needs to be done to precisely characterize it. In this work, we made further developments on the study of luminescence of quartz from La Sassa, Tuscany: a sample with unique properties in this regard. Photoluminescence (PL) measurements allowed study of the excitation profile of the previously reported luminescence, showing an excitation maximum at around 4.3 eV, among other minor ones. This kind of luminescence has also been studied as a function of X-ray irradiation, showing that ionizing radiation desensitizes the photoluminescence emissions. New radioluminescence (RL) measurements have been done to study the effect of thermal annealing at 1000 °C, showing a more complex emission picture in the red region (1.8–2.0 eV), with multiple emissions. The data presented here allow more precise assumptions regarding the assignment of the centers responsible for each emission. The assignment has been confirmed by chemical profiles measured by laser-ablation inductively coupled plasma (ICP) mass spectrometry. The previously tentative assignment of non-bridging oxygen hole centers (NBOHCs) has been disproved for the PL and LIF emissions and confirmed for the RL ones.

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Section: Discussionsupporting

confidence: 91%