scholarly journals Novel concept for neutron detection: proportional counter filled with 10B nanoparticle aerosol

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
F. D. Amaro ◽  
C. M. B. Monteiro ◽  
J. M. F. dos Santos ◽  
A. Antognini
Keyword(s):  
Proportional Counter ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Radiation Detection ◽  
Neutron Detection ◽  
Nuclear Material ◽  
Sensitive Material ◽  
Proportional Counters ◽  
Thermal Neutron Beam ◽  
Novel Concept

Abstract The high neutron detection efficiency, good gamma-ray discrimination and non-toxicity of 3He made of proportional counters filled with this gas the obvious choice for neutron detection, particularly in radiation portal monitors (RPM), used to control the illicit transport of nuclear material, of which neutron detectors are key components. 3He is very rare and during the last decade this gas has become increasingly difficult to acquire. With the exception of BF3, which is toxic, no other gas can be used for neutron detection in proportional counters. We present an alternative where the 3He atoms are replaced by nanoparticles made of another neutron sensitive material, 10B. The particles are dispersed in a gaseous volume, forming an aerosol with neutron sensitive properties. A proportional counter filled with such aerosol was exposed to a thermal neutron beam and the recorded response indicates that the neutrons have interacted with the particles in the aerosol. This original technique, which transforms a standard proportional gas mixture into a neutron sensitive aerosol, is a breakthrough in the field of radiation detection and has the potential to become an alternative to the use of 3He in proportional counters.

Study on Thallium Bromide Radioactive Detector

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
He Li-xia ◽  
Hao Xiao-yong ◽  
He Gao-kui
Keyword(s):  
High Energy Physics ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Nuclear Material ◽  
High Energy ◽  
Device Fabrication ◽  
Signal Acquisition ◽  
X Ray ◽  
Thallium Bromide ◽  
And Performance

Thallium bromide (TlBr) is a compound semiconductor material, which can be used for X-ray and gamma-ray detectors and can be used at room temperature. It has excellent physical properties, high atomic number and density, wide bandgap (B = 2.68 eV), and low ionization energy. Compared with other X-ray and gamma-ray detection materials, TlBr devices have high detection efficiency and excellent energy resolution performance. So TlBr is suitable for housing in small tubes or shells, and it can be widely used in nuclear material measurement, safeguards verification, national security, space high-energy physics research, and other fields. Based on the fabrication of TlBr prototype detector, this paper focuses on the device fabrication and signal acquisition technology. Gamma-ray spectrum measurements and performance tests are carried out with AM-241 radioactive source. The results show that the special photoelectric peak of 59.5 keV is clearly visible, and the optimal resolution is 4.15 keV (7%).

scholarly journals Thin Film Polymer Composite Scintillators for Thermal Neutron Detection

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Andrew N. Mabe ◽  
John D. Auxier ◽  
Matthew J. Urffer ◽  
Stephen A. Young ◽  
Dayakar Penumadu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Neutron ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Fluorescence Emission ◽  
Neutron Detection ◽  
Fluorescent Sensors ◽  
Neutron Detectors ◽  
Neutron Detection Efficiency ◽  
Film Polymer

Thin film polystyrene composite scintillators containing LiF6 and organic fluors have been fabricated and tested as thermal neutron detectors. Varying fluorescence emission intensities for different compositions are interpreted in terms of the Beer-Lambert law and indicate that the sensitivity of fluorescent sensors can be improved by incorporating transparent particles with refractive index different than that of the polymer matrix. Compositions and thicknesses were varied to optimize the fluorescence and thermal neutron response and to reduce gamma-ray sensitivity. Neutron detection efficiency and neutron/gamma-ray discrimination are reported herein as functions of composition and thickness. Gamma-ray sensitivity is affected largely by changing thickness and unaffected by the amount of LiF6 in the film. The best neutron/gamma-ray discrimination characteristics are obtained for film thicknesses in the range 25–150 μm.

scholarly journals Energy calibration of He-3, He-4 Neutron Proportional Counters

2020 ◽  
Vol 13 ◽  
pp. 222
Author(s):  
M. Manolopoulou ◽  
M. Fragopoulou ◽  
S. Stoulos ◽  
C. Koukorava ◽  
M. Zamani
Keyword(s):  
Linear Dependence ◽  
Proportional Counter ◽  
Pulse Shaping ◽  
Gamma Ray ◽  
Energy Calibration ◽  
Tandem Accelerator ◽  
Neutron Spectra ◽  
Shaping Time ◽  
Energy Peak ◽  
Proportional Counters

Two helium filled proportional counters (He-3, He-4) were irradiated with neu- trons in the energy range 0.025 eV - 10.7 MeV, in the Tandem accelerator, NCSR Demokritos, Athens. The full energy peak in He-3 proportional counter as well as the recoil peaks in He-3 and He-4 counters show linear dependence with neutron energy. A study of gamma ray contribution to the neutron spectra of He-4 counter was performed as a function of the pulse shaping time.

scholarly journals Zero-dimensional Cs4EuX6 (X = Br, I) all-inorganic perovskite single crystals for gamma-ray spectroscopy

2018 ◽  
Vol 6 (25) ◽  
pp. 6647-6655 ◽  
Author(s):  
Yuntao Wu ◽  
Dan Han ◽  
Bryan C. Chakoumakos ◽  
Hongliang Shi ◽  
Shiyou Chen ◽  
...  
Keyword(s):  
Single Crystals ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Radiation Detection ◽  
High Radiation ◽  
Inorganic Perovskite ◽  
Gamma Ray Spectroscopy ◽  
Blue Emitters ◽  
Scalable Synthesis

The zero-dimensional all-inorganic perovskites are self-activated blue emitters with slight hygroscopicity, scalable synthesis, and high radiation detection efficiency.

Study on TlBr Radioactive Detector

2017 ◽  
Author(s):  
He Li-xia ◽  
Hao Xiao-yong ◽  
He Gao-kui
Keyword(s):  
Room Temperature ◽  
High Energy Physics ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Nuclear Material ◽  
High Energy ◽  
High Detection ◽  
High Detection Efficiency ◽  
Excellent Energy Resolution ◽  
Energy Physics

TlBr is a kind of semiconductor material. Due to its promising physical properties and can be used at room temperature, it is continually studied as X and gamma ray detectors candidate material. Both of its atomic number and density are high. It also has large band-gap (B = 2.68eV) and low ionization energy. TlBr device exhibits high detection efficiency and excellent energy resolution. It can be easily fabricated or compacted in small housing. So it is a reasonable selection in the fields of nuclear material inspection and safeguards property, national security, spatial and high energy physics researches. The paper investigates the TlBr radioactive detector development and fabrication procedures. The processing detail information and signals collection are emphasized in different section. The prototype detectors were irradiated by Am-241 and corresponding spectrum was obtained. The photoelectric peak at 59.5keV is distinguished visible and the best resolution at 59.5keV is 4.15keV (7%).

Neutron detection efficiency and response functions of a thin neutron silicon sensor with low gamma-ray sensitivity

2017 ◽  
Vol 106 ◽  
pp. 585-590 ◽  
Author(s):  
Masashi Takada ◽  
Tomoya Nunomiya ◽  
Tetsuro Matsumoto ◽  
Akihiko Masuda ◽  
Yusaku Watanabe ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Detection Efficiency ◽  
Neutron Detection ◽  
Response Functions ◽  
Neutron Detection Efficiency ◽  
Silicon Sensor

scholarly journals Erratum: Corrigendum: Novel concept for neutron detection: proportional counter filled with 10B nanoparticle aerosol

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
F. D. Amaro ◽  
C. M. B. Monteiro ◽  
J. M. F. dos Santos ◽  
A. Antognini
Keyword(s):  
Proportional Counter ◽  
Neutron Detection ◽  
Novel Concept
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