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

Britt Vandezande; Olivier Van Hoey; Jérémie Dabin

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

Britt Vandezande, Olivier Van Hoey, Jérémie Dabin

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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 language	English
Qualification	Industrial Engineer
Awarding Institution	Hasselt University
Supervisors/Advisors	Schroeyers, Wouter, Supervisor, External person Van Hoey, Olivier, SCK CEN Mentor Dabin, Jérémie, SCK CEN Mentor
Date of Award	3 Jul 2023
Publisher	UHasselt - Universiteit Hasselt
State	Published - 15 Jun 2023

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Cite this

@phdthesis{6f32def80a934d3c83c5e29be653ef33,

title = "Characterisation of the intrinsic dose response of lithium fluoride based thermoluminescent detectors",

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.",

keywords = "TLD, LiF, High dose response, Luminescence efficiency",

author = "Britt Vandezande and {Van Hoey}, Olivier and J{\'e}r{\'e}mie Dabin",

note = "Score=N/A",

year = "2023",

month = jun,

day = "15",

language = "English",

publisher = "UHasselt - Universiteit Hasselt",

type = "Academic Bachelor's thesis",

school = "Hasselt University",

}

TY - THES

T1 - Characterisation of the intrinsic dose response of lithium fluoride based thermoluminescent detectors

AU - Vandezande, Britt

AU - Van Hoey, Olivier

AU - Dabin, Jérémie

N1 - Score=N/A

PY - 2023/6/15

Y1 - 2023/6/15

N2 - 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.

AB - 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.

KW - TLD

KW - LiF

KW - High dose response

KW - Luminescence efficiency

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/81054834

M3 - Academic Bachelor's thesis

PB - UHasselt - Universiteit Hasselt

ER -