Performance of 5-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e367" altimg="si5.svg"><mml:mi>μ</mml:mi></mml:math>m PIN diamond diodes as thermal neutron detectors

Holmes, Jason; Brown, Jesse; Koeck, Franz A.; Johnson, H. M.; Benipal, Manpuneet; Kandlakunta, Praneeth; Zaniewski, Anna; Alarcón, Ricardo; Cao, Raymond; Goodnick, Stephen M.; Nemanich, R. J.

doi:10.1016/j.nima.2020.163601

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…Semiconductor-based neutron detectors with lining or coating with neutron converter are also used. In this case, the charged particle emitted from the neutron absorber enters to the semiconductor device where further electron–hole pairs are generated and collected at the electrodes 37 , 38 . Doping these detectors with elements that could increase the neutron capture efficiency, for example 10 B enriched hBN neutron detectors 39 , should be the way for increasing the detection efficiency of semiconductor-based devices.…”

Section: Introductionmentioning

confidence: 99%

Hybrid halide perovskite neutron detectors

Andričević

Náfrádi

Kollár

et al. 2021

Sci Rep

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Interest in fast and easy detection of high-energy radiation (x-, γ-rays and neutrons) is closely related to numerous practical applications ranging from biomedicine and industry to homeland security issues. In this regard, crystals of hybrid halide perovskite have proven to be excellent detectors of x- and γ-rays, offering exceptionally high sensitivities in parallel to the ease of design and handling. Here, we demonstrate that by assembling a methylammonium lead tri-bromide perovskite single crystal (CH3NH3PbBr3 SC) with a Gadolinium (Gd) foil, one can very efficiently detect a flux of thermal neutrons. The neutrons absorbed by the Gd foil turn into γ-rays, which photo-generate charge carriers in the CH3NH3PbBr3 SC. The induced photo-carriers contribute to the electric current, which can easily be measured, providing information on the radiation intensity of thermal neutrons. The dependence on the beam size, bias voltage and the converting distance is investigated. To ensure stable and efficient charge extraction, the perovskite SCs were equipped with carbon electrodes. Furthermore, other types of conversion layers were also tested, including borated polyethylene sheets as well as Gd grains and Gd2O3 pellets directly engulfed into the SCs. Monte Carlo N-Particle (MCNP) radiation transport code calculations quantitatively confirmed the detection mechanism herein proposed.

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Section: Introductionmentioning

confidence: 99%

Hybrid halide perovskite neutron detectors

Andričević

Náfrádi

Kollár

et al. 2021

Sci Rep

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“…A study of the performance of diamond detectors in a high-temperature environment showed that diamond can work properly in a spectrometric mode at temperatures of up to 240

C with an energy resolution (FWHM) of approximately 3.5% [ 9 ]. In addition to a diamond detector with a LiF converter layer, the thermal neutron detection performance of a PIN-type diamond detector using a boron nitride converter layer was reported [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Neutron Detection Performance of Four Thin-Film Semiconductor Neutron Detectors Based on Geant4

Zhang

Aspinall

2021

Sensors

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Third-generation semiconductor materials have a wide band gap, high thermal conductivity, high chemical stability and strong radiation resistance. These materials have broad application prospects in optoelectronics, high-temperature and high-power equipment and radiation detectors. In this work, thin-film solid state neutron detectors made of four third-generation semiconductor materials are studied. Geant4 10.7 was used to analyze and optimize detectors. The optimal thicknesses required to achieve the highest detection efficiency for the four materials are studied. The optimized materials include diamond, silicon carbide (SiC), gallium oxide (Ga2O3) and gallium nitride (GaN), and the converter layer materials are boron carbide (B4C) and lithium fluoride (LiF) with a natural enrichment of boron and lithium. With optimal thickness, the primary knock-on atom (PKA) energy spectrum and displacements per atom (DPA) are studied to provide an indication of the radiation hardness of the four materials. The gamma rejection capabilities and electron collection efficiency (ECE) of these materials have also been studied. This work will contribute to manufacturing radiation-resistant, high-temperature-resistant and fast response neutron detectors. It will facilitate reactor monitoring, high-energy physics experiments and nuclear fusion research.

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“…The superior diamond resistance to ionizing radiation associated with its unique electronic properties like the mobility of charge carriers, the wide bandgap energy (5.47 eV) [1] and the consequent low leakage current makes it an appealing material for the detection of photons from UV [2][3][4] to X-rays [5][6][7], charged particles [8][9][10], thermal [11] and fast neutrons [12][13][14][15]. Detectors based on diamond demonstrated a fast response [6,16] and high sensitivity [17] to X-ray beams, providing high applied electric fields with low bias voltage [18] as well as photovoltaic-mode operations [19,20], which enabled the successful application to the medical sector for the monitoring of radiation beams utilized in radiation therapy [21][22][23] and mammography [24].…”

Section: Introductionmentioning

confidence: 99%

X-ray Spectrum Reconstruction by Diamond Detectors with Linear Response to Dose Rate

Trucchi

Ascarelli

2021

Crystals

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The absorbers method is here applied by interposing filters of variable thickness between the X-ray source and a detector so to attenuate the radiation intensity by using the attenuation coefficient as a selective photon energy operator. The analysis of the signal provided by a polycrystalline diamond thin film detector exposed to the energy-selectively-attenuated X-ray beam was used for the reconstruction of the radiation spectrum. The 50 μm thick diamond detector achieves conditions of linear response to the dose rate of the incident radiation (linearity coefficient of 0.997 ± 0.003) for a bias voltage ≥90 V, corresponding to an electric field ≥1.8 × 104 V/cm. Once the absorbers method is applied, only the detector signal linearity to dose rate allows reconstructing the source X-ray bremsstrahlung spectrum with sufficiently high accuracy.

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Performance of 5-μm PIN diamond diodes as thermal neutron detectors

Cited by 9 publications

References 15 publications

Hybrid halide perovskite neutron detectors

Hybrid halide perovskite neutron detectors

Comparison of Neutron Detection Performance of Four Thin-Film Semiconductor Neutron Detectors Based on Geant4

X-ray Spectrum Reconstruction by Diamond Detectors with Linear Response to Dose Rate

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