The detection efficiency and the response function of semiconductor proton recoil counters with axial symmetry to a point neutron source

Gotoh, Hiroshi; Yagi, H.

doi:10.1016/0029-554x(72)90215-7

Cited by 19 publications

(3 citation statements)

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“…Empirical demonstration of this proposed x y device [232,536] has not been reported and is a significant improvement on the traditional telescope and an excellent direction for theoretical [532,533], computational and experimental development.…”

Section: Resolving Incident Neutron Kinetic Energymentioning

confidence: 99%

“…Conservation of energy may be used in one or any combination of four methods to determine incident neutron energy: (1) through the determination of the angular distribution of neutron-induced recoil nuclei; (2) by the predictable reduction of neutron energy through elastic scattering; (3) from the determination of the difference in energies of neutron-induced capture reaction or fission fragment nuclei relative to the reaction energy Q or (4) by the broadening of spectroscopically resolved peaks caused by inelastic scattering. The physics associated with the first method was initially described in 1941 by Amaldi [526,527] and subsequently optimized with solid-state detectors for the proton recoil telescope geometry from 1948 to the present [179, 232,248,252,257,330,332,[528][529][530][531][532][533][534][535][536][537][538][539]. In this geometry, the telescope diameter and distance from the proton radiator form a solid angle by which neutron energy incident to the radiator may be determined according to E p = E n cos 2 ϕ, where E p and E n are the proton and neutron energies and ϕ is the angle between the incident neutron and scattered proton (figures 11(a) and (b)).…”

Section: Resolving Incident Neutron Kinetic Energymentioning

confidence: 99%

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The physics of solid-state neutron detector materials and geometries

Caruso

2010

J. Phys.: Condens. Matter

121

111

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Detection of neutrons, at high total efficiency, with greater resolution in kinetic energy, time and/or real-space position, is fundamental to the advance of subfields within nuclear medicine, high-energy physics, non-proliferation of special nuclear materials, astrophysics, structural biology and chemistry, magnetism and nuclear energy. Clever indirect-conversion geometries, interaction/transport calculations and modern processing methods for silicon and gallium arsenide allow for the realization of moderate- to high-efficiency neutron detectors as a result of low defect concentrations, tuned reaction product ranges, enhanced effective omnidirectional cross sections and reduced electron-hole pair recombination from more physically abrupt and electronically engineered interfaces. Conversely, semiconductors with high neutron cross sections and unique transduction mechanisms capable of achieving very high total efficiency are gaining greater recognition despite the relative immaturity of their growth, lithographic processing and electronic structure understanding. This review focuses on advances and challenges in charged-particle-based device geometries, materials and associated mechanisms for direct and indirect transduction of thermal to fast neutrons within the context of application. Calorimetry- and radioluminescence-based intermediate processes in the solid state are not included.

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Section: Resolving Incident Neutron Kinetic Energymentioning

confidence: 99%

Section: Resolving Incident Neutron Kinetic Energymentioning

confidence: 99%

The physics of solid-state neutron detector materials and geometries

Caruso

2010

J. Phys.: Condens. Matter

121

111

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“…The SI GaAs detector detects the recoil protons, 5 and the HDPE layer is directly sensitive to the fast neutrons. 10,11 As the protons are slowed down in the detector volume, electron-hole pairs are created. The high electric field between the detector electrodes separates the generated charges, and the pulse corresponding to proton energy can be measured at the output of the detector (see Fig.…”

Section: Methodsmentioning

confidence: 99%

Semi-insulating GaAs detectors with HDPE layer for detection of fast neutrons from D–T nuclear reaction

Šagátová

Затько

Sedlačková

et al. 2016

Int. J. Mod. Phys. Conf. Ser.

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Bulk semi-insulating (SI) GaAs detectors optimized for fast-neutron detection were examined using mono-energetic neutrons. The detectors have an active area of 7.36 mm 2 defined by a multipixel structure of a AuZn Schottky contact allowing a relatively high breakdown voltage (300 V) sufficient for full depletion of the detector structure. The Schottky contact is covered by a HDPE (high density polyethylene) conversion layer, where neutrons transfer their kinetic energy to hydrogen atoms through elastic nuclear collisions. The detectors were exposed to mono-energetic neutrons generated by a deuterium (D)-tritium (T) nuclear reaction at a Van A. Sagatova et al. 1660233-2Neutrons reached a kinetic energy of 16.8 MeV when deuterons were accelerated by 1 MV potential. The influence of the HDPE layer thickness on the detection efficiency of the fast neutrons was studied. The thickness of the conversion layer varied from 50 μm to 1300 μm. The increase of the HDPE layer thickness led to a higher detection efficiency due to higher conversion efficiency of the HDPE layer. The effect of the active detector thickness modified by the detector reverse bias voltage on the detection efficiency was also evaluated. By increasing the detector reverse voltage, the detector active volume expands to the depth and also to the sides, slightly increasing the neutron detection efficiency.

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General instrumentation

England¹

1974

Techniques in Nuclear Structure Physics

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The detection efficiency and the response function of semiconductor proton recoil counters with axial symmetry to a point neutron source

Cited by 19 publications

References 0 publications

The physics of solid-state neutron detector materials and geometries

The physics of solid-state neutron detector materials and geometries

Semi-insulating GaAs detectors with HDPE layer for detection of fast neutrons from D–T nuclear reaction

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