Characterisation of the intrinsic dose response of lithium fluoride based thermoluminescent detectors

Research output

Abstract

Interpretation of lithium fluoride-based thermoluminescent detectors (LiF TLDs) in mixed high energy radiation fields, such as those encountered in space and accelerator facilities, is challenging due to variations in relative luminescence efficiency with radiation type and energy. This study aims to assess the intrinsic macroscopic dose response of MCP-N, MTS-N, and MTT-7 TLDs with the default protocols used at SCK CEN. The TLDs were subjected to a four-step protocol involving annealing, irradiation, preheating and readout. The irradiation was performed with a 60Co γ-ray source. The dose response data were obtained by analyzing the light intensity signals using the WinREMS software and deconvolution software GlowFit. The glow curves of the TLDs were analyzed from a dose of 0.05 Gy up to 15.6 kGy and the linearity indices of the TLDs were determined. The results show the effect of dose on the glow curves and the emergence of additional peaks at higher doses. The response to radiation dose from the main peak was found to be supralinear for MTS-N and MTT-7 detectors and sublinear for MCP-N detectors. The study provides valuable insights into the dose response characteristics of LiF TLDs and contributes to improving their interpretation in mixed radiation fields.
Original languageEnglish
QualificationIndustrial Engineer
Awarding Institution
  • Uhasselt - Hasselt University
Supervisors/Advisors
  • Schroeyers, Wouter, Supervisor, External person
  • Van Hoey, Olivier, SCK CEN Mentor
  • Dabin, Jérémie, SCK CEN Mentor
Date of Award3 Jul 2023
Publisher
StatePublished - 15 Jun 2023

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