Position of LiF:Mg, Cu, P TL peak as an alternative method for ultra-high-dose dosimetry. (December 2020)

• Record Type: Journal Article
• Authors: Bilski, P.; Obryk, B.; Gieszczyk, W.; Baran, P.
• Is Part Of: Radiation measurements. Volume 139(2020:Aug.)
• Publication Date: 2020-12
• Subjects: Thermoluminescence -- LiF -- Mg, Cu, P -- High-dose dosimetry; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2020.106486
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: LiF:Mg, Cu, P thermoluminescent glow-curve, which shape up to a dose of 1 Gy is remarkably invariable, at higher doses undergoes very strong changes. The most important of them is an occurrence of a new high-temperature peak B, which shows a peculiar property: its position shifts towards higher temperatures with increasing doses. In this work, the possibility of exploiting this shift of peak position for ultra-high-dose dosimetry is studied. The performed investigations, after irradiations with 6 MeV electron doses ranging up to 1.2 MGy confirmed that this property may be indeed successfully used for dosimetry. For doses exceeding about 40 kGy, i.e. for glow-curves for which peak B is well visible, the method based on the simple evaluation of the position of the global maximum of a glow-curve produced very good results. The use of peak position as a measure of the dose makes the proposed method extraordinary resistant to applications at high-temperature conditions. It was found, that it is possible to perform correct measurement of the absorbed dose with detectors subjected before the readout to a pre-heat even up to 350 °C. Highlights: Position of LiF:Mg, Cu, P TL peak used for dose measurements at ultra-high dose range. The proposed method shows exceptional resistance to high-temperature environment. The method allows dose up to 1 MGy to be measured.