Passive neutron area monitor with pairs of TLDs as neutron detector

Vega-Carrillo, Héctor René; Guzmán-García, Karen Arlete; Gallego, Eduardo; Lorente, Alfredo

doi:10.1016/j.radmeas.2014.08.006

Cited by 18 publications

(7 citation statements)

References 27 publications

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“…The two TLD600 chips, enriched in 6 Li, can detect photons, charged particles and thermal neutrons (through the 6 Li(n, α) 3 H reaction), while the two TLD700 chips, where the 6 Li fraction has been depleted, respond identically to the TLD600 to gamma radiation and charged particles but are not as sensitive to thermal neutrons. This allows a separation of the neutron TL signal in a mixed radiation field by subtraction of the TLD700 signal from the one measured by the TLD600 [26][27][28]. The readout procedure of the TLD600H/700H crystals is described in the Supplementary Material.…”

Section: Gsi Ball: a Tld-based Neutron Dosimetermentioning

confidence: 99%

Characterization of the Secondary Neutron Field Produced in a Thick Aluminum Shield by 1 GeV/u 56Fe Ions Using TLD-Based Ambient Dosimeters

et al. 2020

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The neutron ambient dose equivalent induced by galactic cosmic-ray-like (1 GeV/u 56 Fe) radiation stopped in a thick aluminum shield was measured at different angles with a GSI neutron ball, the standard TLD (thermoluminescent dosimeters)-based neutron dosimeter for area monitoring at the GSI facility. In order to measure reliably at large angles, a modified version of the GSI ball, including a set of three more sensitive TLD600H/700H cards, instead of one standard TLD600/700 card was used. The modified GSI balls were calibrated in neutron reference fields of 241 Am-Be(α,n) available at the Physikalisch-Technische Bundesanstalt (PTB). The neutron ambient dose equivalent was measured at five different angles (15, 40, 90, 115, and 130 degrees) with respect to the beam direction and compared to the calculated detector response and neutron ambient dose equivalent results from FLUKA simulations. The dosimeter readings were corrected for signal contributions coming from secondary charged particles. An agreement within 15% was found between the measured and calculated GSI ball response and an agreement within 30% was found between experiments and calculated neutron dose equivalents.

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Section: Gsi Ball: a Tld-based Neutron Dosimetermentioning

confidence: 99%

Characterization of the Secondary Neutron Field Produced in a Thick Aluminum Shield by 1 GeV/u 56Fe Ions Using TLD-Based Ambient Dosimeters

et al. 2020

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“…In all Monte Carlo calculations, the number of histories was large enough to obtain uncertainties of less than 5%. For the calculations, the cross sections were taken from the ENDF/B VI library, where the S(α, β) treatment was included to take into account the thermalized neutron interactions (Vega Carrillo et al, 2014).…”

Section: Model Of Vehicle With Snms In Customsmentioning

confidence: 99%

Performance of 10B+ZnS(Ag) neutron detectors in RPM for the detection of special nuclear materials

Guzmán-García

Vega-Carrillo

Gallego

et al. 2017

Radiation Measurements

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“…Neutrons are transported through the polyethylene and reaching the sample. In order to take into account the transport of thermal neutron the S(α, β) treatment was included [Vega Carrillo et al (2014)]. In the model, the NaI(Tl) de tector was positioned at 13 cm from the sample, aligning the axial axis of the sample and detectors.…”

Section: Monte Carlo Calculationsmentioning

confidence: 99%

Study by Monte Carlo methods of an explosives detection system made up with a D-D neutron generator and NaI(Tl) gamma detectors

Cevallos-Robalino

Fernández

Gallego

et al. 2018

Applied Radiation and Isotopes

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Detection of hidden explosives is of utmost importance for homeland security. Several configurations of an Explosives Detection System (EDS) to intercept hidden threats, made up with a Deuterium-Deuterium (D-D) compact neutron generator and NaI (Tl) scintillation detectors, have been evaluated using MCNP6 code. The system's response to various samples of explosives, such as RDX and Ammonium Nitrate, is analysed. The D-D generator is able to produce fast neutrons with 2.5 MeV energy in a maximum yield of 10 n/s. It is surrounded by high-density polyethylene to thermalize the fast neutrons and to optimize interactions with the sample inspected, whose emission of gamma rays gives a characteristic spectrum of the elements that constitute it. This procedure allows to determine its chemical composition and to identify the type of substance. The necessary shielding is evaluated to estimate its thicknesses depending on the admissible dose of operation, using lead and polyethylene. The results show that its functionality is promising in the field of national security for explosives inspection.

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Passive neutron area monitor with pairs of TLDs as neutron detector

Cited by 18 publications

References 27 publications

Characterization of the Secondary Neutron Field Produced in a Thick Aluminum Shield by 1 GeV/u 56Fe Ions Using TLD-Based Ambient Dosimeters

Characterization of the Secondary Neutron Field Produced in a Thick Aluminum Shield by 1 GeV/u 56Fe Ions Using TLD-Based Ambient Dosimeters

Performance of 10B+ZnS(Ag) neutron detectors in RPM for the detection of special nuclear materials

Study by Monte Carlo methods of an explosives detection system made up with a D-D neutron generator and NaI(Tl) gamma detectors

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