Design and feasibility of a multi-detector neutron spectrometer for radiation protection applications based on thermoluminescent 6LiF:Ti,Mg (TLD-600) detectors

Lis, M.; Gómez-Ros, J.M.; Bedogni, R.; Delgado, Antonio

doi:10.1016/j.nima.2007.10.009

Cited by 18 publications

(3 citation statements)

References 14 publications

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“…Among different neutron sensitive detectors, our choice was done for the passive thermoluminescence dosimetry (TLD) cards, which are routinely used at GSI for neutron dose measurements [6], and are known to be very suitable for neutron spectrometry [7,8]. The TLDs have several advantages, as they are robust and give readings with small uncertainties in different neutron fields from few μSv to several Sv, and are perfect to measure the accumulative spectrum for pulsed radiation, and especially for extremely short neutron pulses, as for example in case of laser driven accelerators [9].…”

Section: Jinst 16 P10022mentioning

confidence: 99%

Neutron spectra at a high energy heavy ion accelerator measured with a TLD-based Bonner spectrometer.

et al. 2021

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A Bonner sphere spectrometer with TLD cards as sensitive elements was constructed and used at the GSI accelerator complex to measure the neutron spectral fluence rates for radiation safety purposes. The neutron spectra were measured in the synchrotron tunnel during 550 MeV/u 40Ar beam operation and in Cave A experimental area with a 1 GeV/u 56Fe beam impinging on a thick aluminum target. Unfolded spectra were compared with those calculated using the Monte Carlo code FLUKA. The measured spectra show a good agreement with the simulations and the set proved itself to be a useful tool for different radiation safety purposes.

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Section: Jinst 16 P10022mentioning

confidence: 99%

Neutron spectra at a high energy heavy ion accelerator measured with a TLD-based Bonner spectrometer.

et al. 2021

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“…CCURATE measurements of neutron dose rates is of great importance for radiation protection applications. To fulfill these objectives, Bonner spheres [1] were developed more than 40 years ago and are still used, due to continuous optimizations of the detectors efficiencies and new patterns of use, from one detector per Bonner sphere at the beginning to multiple detectors at different depths in only one sphere [1,2,3].…”

Section: Introductionmentioning

confidence: 99%

Deconvolution methods used for the development of a neutron spectrometer

Simonetti

Labalme

Trolet³

et al. 2021

EPJ Web Conf.

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To fulfill the requirements of the industry, the feasibility of a transportable neutron spectrometer is under study by our collaboration. Preliminary studies have led to a solution based on a unique-multi-detectors-Bonner sphere, which has the advantage to simultaneously perform many neutrons-measurements through thermal neutron detectors placed at different depths inside a polyethylene sphere. The incident neutron energy is then reconstructed using unfolding methods. The optimization of the layout of the detectors in the sphere and of the diameter of the sphere was performed thanks to GEANT4 simulations, coupled to unfolding methods such as least-squares, maximum of entropy or maximum of likelihood. Different unfolding methods have been tested. For the time being, the best unfolding results were obtained by the computer codes M.A.X.E.D. and G.R.A.V.E.L., formalized by the Nuclear Energy Agency (N.E.A.). A “personal” method based on the maximum of entropy coupled to the maximum of likelihood gives good results as well, but a few convergence parameters have still to be optimized. In the present paper, a solution of a multi-detectors-Bonner sphere is presented as well as results of unfolded neutron energy spectra. The results obtained show a good agreement with unmoderated and moderated Am/Be and 252Cf spectra.

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“…M. Lis, J.M. Gómez-Ros, and R. Bedogni studied a new single-sphere spectrometer composed of a polyethylene sphere and several thermoluminescence dosimeters [19][20][21][22]. The dosimeters contain 6 Li and are placed symmetrically in the sphere to improve the accuracy and isotropy of the system response.…”

Section: Introductionmentioning

confidence: 99%

Design and verification of a multi-layer single-sphere neutron spectrometer with water as the moderator

Wang

et al. 2021

J. Inst.

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Measuring the neutron energy spectrum is important in nuclear radiation detection and protection. Common neutron spectrometers include the Bonner sphere spectrometer (BSS), time-of-flight neutron spectrometer, and plastic scintillation detector. Among them, the BSS is the most widely used for its wide measurement range and simple operation. A BSS usually occupies a large space because it contains several independent spheres working at the same time, leading to poor consistency. This paper proposes a multi-layer single-sphere spectrometer using water as the moderator. The spectrometer includes a multi-layered sphere that can be filled with water or air and a ^3He proportional counter placed in the center of the sphere. To verify the feasibility of this design, we use Geant4 to calculate the moderating ability of water and the response functions of the multi-layer single-sphere spectrometer. Additionally, several standard neutron energy spectra (from IAEA) are used to test the response characteristics of this spectrometer through simulation. The simulation results prove the feasibility of the design. This research provides a theoretical basis for a multi-layer single-sphere neutron spectrometer with water as the moderator.

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Design and feasibility of a multi-detector neutron spectrometer for radiation protection applications based on thermoluminescent 6LiF:Ti,Mg (TLD-600) detectors

Cited by 18 publications

References 14 publications

Neutron spectra at a high energy heavy ion accelerator measured with a TLD-based Bonner spectrometer.

Neutron spectra at a high energy heavy ion accelerator measured with a TLD-based Bonner spectrometer.

Deconvolution methods used for the development of a neutron spectrometer

Design and verification of a multi-layer single-sphere neutron spectrometer with water as the moderator

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