A new official albedo dosemeter based on thermoluminescent detectors has been introduced in 2015 by the individual monitoring service of the Helmholtz Zentrum München for monitoring persons who are exposed occupationally against photon and neutron radiation. To enhance the sensitivity for fast neutrons, a new badge with an enlarged albedo window has been developed at TU Dresden. The properties of the new albedo dosemeter are discussed, and the results of official intercomparisons and field calibrations are shown.
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http://dx.doi.org/10.1093/rpd/ncv406 | DOI Listing |
Radiat Prot Dosimetry
September 2022
Instituto de Radioproteção e Dosimetria, Comissão Nacional de Energia Nuclear, Rio de Janeiro, RJ, Brazil.
Albedo dosemeters for neutron individual monitoring are used worldwide and their response to the same dose can vary by more than one order of magnitude, depending on the neutron workplace spectrum. Two-component albedo dosemeters use two pairs of TLDs, one pair to measure incident neutrons (i) and another to measure albedo neutrons (a), used to corrections to the neutron HP(10). A Workplace Correction Factor (WCF) as a function of the i/a ratio can be plotted from experimental or simulated measurements.
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November 2021
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Neutron response functions of a silicon sensor, which is applied to a new real-time personal albedo neutron dosemeter, have been simulated for low energy neutrons from 0.01 eV to 10 keV using the Monte Carlo technique. The angular neutron response functions were obtained by multiplying simulated neutron energy spectra crossing the neutron sensor and the cross-section of the 6Li(n,t)4He reaction.
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December 2020
Department of Civil and Industrial Engineering, University of Pisa, Largo Lazzarino 1, 56122 Pisa, Italy.
The irradiation facility of the University of Pisa (UNIPI) is a neutron and gamma irradiation facility of the University of Pisa used for calibration purposes and to evaluate detectors and dosemeters for mixed neutron and gamma fields. The facility consists of a fairly large room (5.0 × 7.
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June 2020
Materialprüfungsamt NRW, Marsbruchstr. 186, 44287 Dortmund, Germany.
A new thermoluminescence albedo dosemeter with improved properties is developed as part of the TL-DOS project. The dosemeter measures the neutron and photon whole-body dose of radiation workers. The TL-DOS neutron dosemeter is presented and its results of well-known field measurements as well as field calibrations are shown.
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October 2018
Saveetha Engineering College, Thandalam, Chennai, India.
CaSO4:Dy is a reliable high-sensitive themoluminescent phosphor useful for low-level and high-level radiation measurements as it exhibits fading free linear dose response with a single glow peak at ~230°C in these dose regions. For large-scale radiation protection dosimetry service, it is embedded in Teflon matrix with varying thicknesses. Extensive studies have been carried out with such CaSO4:Dy Teflon discs in individual and environmental radiation monitoring applications including its capability to measure International Commission on Radiation Units and Measurements operational quantities.
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