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Radiofluorescence as a detection tool for quartz luminescence quenching processes

Title data

Friedrich, Johannes ; Kreutzer, Sebastian ; Schmidt, Christoph:
Radiofluorescence as a detection tool for quartz luminescence quenching processes.
In: Radiation Measurements. Vol. 120 (2018) . - pp. 33-40.
ISSN 1350-4487
DOI: https://doi.org/10.1016/j.radmeas.2018.03.008

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
Modelling quartz luminescence signal dynamics relevant for dating and dosimetrySCHM3051/4-1

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Thermal quenching is a well-known phenomenon in quartz, which describes the decrease in luminescence efficiency (light output) with sample temperature. In the present work, the UV radiofluorescence (RF) signals of three different quartz samples during cooling from 500 °C to room temperature were monitored and analysed. Resulting thermal quenching parameters W (activation energy) and K (constant) agree with published values, except for one sample. Another quenching process in quartz is the reduction of luminescence sensitivity following irradiation (dose quenching), mainly known for TL and OSL of old samples with large palaeodoses. Here, the intensity of the 110 °C TL peak and the OSL signal were used to monitor the dose quenching effect. UV-OSL and UV-TL signals are analysed and found to be very similar. The UV-RF recorded during irradiation in between repeated cycles of TL and OSL measurements differs at high doses from a continuously recorded reference signal. Furthermore, numerical simulations are presented to decipher the charge transport processes in quartz. In summary, thermal quenching simulations are capable of mimicking experimental findings and confirm that UVRF is a valuable tool to determine thermal quenching parameters. Dose quenching simulations differ from experimental results in the high dose range but help to understand the basic principle of dose quenching: charge competition of different centres.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Quenching; Thermoluminescence; Optically stimulated luminescence; Radiofluorescence; Simulation; Quartz
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Geomorphology - Univ.-Prof. Dr. Ludwig Zöller
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Profile Fields > Advanced Fields > Nonlinear Dynamics
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 28 Jan 2019 09:06
Last Modified: 28 Jan 2019 09:06
URI: https://eref.uni-bayreuth.de/id/eprint/47045