The blue halite in Morsleben, Germany

• Verfasst von: Biernacka, Magdalena [VerfasserIn]
• Verfasst von: Majgier, Renata [VerfasserIn]
• Verfasst von: Staninski, Krzysztof [VerfasserIn]
• Verfasst von: Kaczmarek, Małgorzata [VerfasserIn]
• Verfasst von: Zelek-Pogudz, Sylwia [VerfasserIn]
• Verfasst von: Sądel, Michał [VerfasserIn]
• Verfasst von: Szufa, Katarzyna M. [VerfasserIn]
• Verfasst von: Blanke, Hartmut [VerfasserIn]
• Verfasst von: Kreutzer, Sebastian [VerfasserIn]
• Titel: The blue halite in Morsleben, Germany
• Titelzusatz: a natural lyoluminescence dosimeter?
• Verf.angabe: Magdalena Biernacka, Renata Majgier, Krzysztof Staninski, Małgorzata Kaczmarek, Sylwia Zelek-Pogudz, Michał Sądel, Katarzyna M. Szufa, Hartmut Blanke, Sebastian Kreutzer
• E-Jahr: 2025
• Jahr: May 2025
• Umfang: 14 S.
• Illustrationen: Illustrationen
• Fussnoten: Online veröffentlicht: 27. Januar 2025, Artikelversion: 31. Januar 2025 ; Gesehen am 01.04.2025
• Titel Quelle: Enthalten in: Journal of luminescence
• Ort Quelle: New York, NY [u.a.] : Elsevier, 1970
• Jahr Quelle: 2025
• Band/Heft Quelle: 280(2025) vom: Mai, Artikel-ID 121088, Seite 1-14
• ISSN Quelle: 1872-7883
• DOI: doi:10.1016/j.jlumin.2025.121088
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Blue halite
• Sach-SW: Colour centres
• Sach-SW: Luminescence dating
• Sach-SW: Lyoluminescence
• Sach-SW: Morsleben
• Sach-SW: Sylvite
• K10plus-PPN: 1920922474

Abstract

The potential of salt as an artificial and natural luminescence dosimeter is well documented in the literature. However, the potential of lyoluminescence, i.e., luminescence during salt dissolution, was neglected over time, and the first attempts to use LL as a natural dosimeter were not followed up on further. In this study, we build upon previous studies and investigate the LL properties of a sylvite vein containing blue halite from the salt repository Morsleben (Germany) and attempt to determine the timing of its last crystallization. We employed four experimental setups optimized for LL detection and present measurements using a high-sensitive CCD camera and photon counting heads to detect and prove the existence of natural LL signals in blue halite and sylvite. An enhanced LL signal was used to estimate the equivalent dose using an additive dose approach. Additional UV-VIS spectroscopy determined colour centres in the studied minerals towards a better understanding of the underlying LL mechanism. Our results indicate that the LL age underestimates the actual crystallization event of the old geological minerals in the repository due to long-term exposure to ionizing radiation. However, we are optimistic that the LL is a promising tool for dating the last crystallization event of certain minerals for younger repositories, where the exposure time was shorter.

Abstract

An analytical solution for the behaviour of quartz radiofluorescence (RF) in the UV-band is described based on a kinetic model involving one (deep) electron trap and two kinds of recombination centres. This model has been previously used to provide a qualitative description of quartz UV-RF. The derived numerical solution of differential equations describing charge transport in quartz can successfully reproduce experimental data. Here, this set of differential equations is solved analytically by assuming a dynamic balance during the RF stimulation. The analytical results are compared with numerical solutions and experimentally derived data. With the analytical solutions a better understanding of common natural quartz UV-RF behaviour is provided, and several experimentally observed phenomena can now be explained. Furthermore the comparison of two different kinetic models shows that the characteristic decay of the UV-RF signal in preheated quartz is attributed to an increasing competition of radiative and non-radiative centres during RF.