Affordable Access

deepdyve-link
Publisher Website

Calibration of the LiF - thermoluminescent detectors used for personal dose equivalent Hp(3) assessment.

Authors
  • Wrzesień, Małgorzata1
  • 1 University of Lodz, Facility of Physics and Applied Informatics, Department of Nuclear Physics and Radiation Safety, Pomorska 149/153, 90-236 Lodz, Poland. Electronic address: [email protected] , (Poland)
Type
Published Article
Journal
Zeitschrift fur medizinische Physik
Publication Date
Aug 01, 2020
Volume
30
Issue
3
Pages
222–226
Identifiers
DOI: 10.1016/j.zemedi.2020.02.004
PMID: 32199699
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The issue of exposure of eye lenses of employees exposed to ionizing radiation is an interesting topic not only from the point of view of deterministic effects related to the occurrence of cataracts, but also dosimetric aspects, in particular the calibration of detectors in units enabling the assessment of eye lens exposure or personal dose equivalent Hp(3). The paper presents the idea of calibrating thermoluminescent detectors designed for the Hp(3) values measurement of gamma radiation, which the source is the process of annihilation of positrons emitted by the deoxyglucose marker - 18F radionuclide. The method was based on the value of air kerma Ka to Hp(3) conversion coefficients (Hp(3,0°)/Ka) developed as part of the ORAMED project. High-sensitivity thermoluminescent detectors (MCP-N) produced in Poland were used in the measurements. During the exposure of the detectors, a 137Cs gamma radiation source (irradiator 137Cs/60Co) and a 20cm diameter cylinder filled with water were used. The value of conversion coefficient Hp(3,0°)/Ka for energy 511 keV is 1.31Sv/Gy and the calibration factor is (3.46±0.03)·10-4 mSv/N (N - number of counts). Verification of the value of the obtained coefficient carried out using a cylinder with a diameter of 20cm showed a difference of less than 2% in relation to the value obtained by the method described in this paper. Copyright © 2020. Published by Elsevier GmbH.

Report this publication

Statistics

Seen <100 times