scholarly journals Development of Gamma-Ray Compton Imager Using Room-Temperature 3-D Position Sensitive Semiconductor Detectors

2003 ◽  
Author(s):  
Zhong He ◽  
David Whe ◽  
Glenn Knoll
Keyword(s):  
Room Temperature ◽  
Gamma Ray ◽  
Semiconductor Detectors ◽  
Position Sensitive

scholarly journals Gamma-Ray Spectral Unfolding of CdZnTe-Based Detectors Using a Genetic Algorithm

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7316
Author(s):  
Nicola Sarzi Amadè ◽  
Manuele Bettelli ◽  
Nicola Zambelli ◽  
Silvia Zanettini ◽  
Giacomo Benassi ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Room Temperature ◽  
Gamma Ray ◽  
Spectral Shape ◽  
Semiconductor Detectors ◽  
Arduous Task ◽  
Γ Ray ◽  
Spectral Unfolding ◽  
Single Pixel ◽  
True Energy

The analysis of γ-ray spectra can be an arduous task, especially in the case of room temperature semiconductor detectors, where several distortions and instrumental artifacts conceal the true spectral shape. We developed a genetic algorithm to perform the unfolding of γ-spectra in order to restore the true energy distribution of the incoming radiation. We successfully validated our approach on experimental spectra of four radionuclides (241Am, 57Co, 137Cs and 133Ba) acquired with two CdZnTe-based detectors with different contact geometries (single pixel and drift strip). The unfolded spectra consist of δ-like peaks in correspondence with the radiation emissions of each radioisotope.

One-step synthesis of well-dispersed polypyrrole copolymers under gamma-ray irradiation

2021 ◽  
Vol 12 (5) ◽  
pp. 645-649
Author(s):  
Yu Gu ◽  
Yuqing Qiao ◽  
Yusen Meng ◽  
Ming Yu ◽  
Bowu Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gamma Ray ◽  
Gamma Ray Irradiation ◽  
One Step ◽  
First Time

Herein, we report for the first time the synthesis of polypyrrole copolymers with good solvent-dispersibility under gamma-ray irradiation at room temperature in air.

A CdTe Position Sensitive Detector for a Hard X-and Gamma-Ray Wide Field Camera

1997 ◽  
Vol 487 ◽  
Author(s):  
E. Caroli ◽  
G. Bertuccio ◽  
G. De Cesare ◽  
A. Donati ◽  
W. Dusi ◽  
...  
Keyword(s):  
Energy Range ◽  
Gamma Ray ◽  
Basic Element ◽  
Medium Size ◽  
Electromagnetic Spectrum ◽  
Wide Field ◽  
Cdte Detector ◽  
Important Region ◽  
Expected Performance ◽  
Position Sensitive

AbstractAn important region of the electromagnetic spectrum for astrophysics is the hard X- and gamma ray band between 10 keV and a few MeV, where several processes occur in a wide variety of objects and with different spatial distribution and time scales. In order to fulfill the observational requirements in this energy range and taking into account the opportunities given by small/medium size missions (e.g. on the ISS), we have proposed a compact, wide field camera based on a thick (1 cm) position sensitive CdTe detector (PSD). The detector is made of an array of 128×96 CdTe microspectrometers with a pixel size of 2×2 mm2. The basic element of the PSD is the linear module that is an independent detection unit with 32 CdTe crystals and monolithic front-electronics (ASIC) supported by a thin (300 μm) ceramic layer. The expected performance of the PSD over the operative energy range and some of the required ASIC functionality are presented and discussed.

First in-beam application of thallium bromide semiconductor detectors to particle-induced X-ray emission

2019 ◽  
Vol 29 (01n02) ◽  
pp. 53-59
Author(s):  
M. Nogami ◽  
K. Hitomi ◽  
A. Terakawa ◽  
K. Ishii
Keyword(s):  
Room Temperature ◽  
Semiconductor Detectors ◽  
Science Center ◽  
Active Volume ◽  
X Ray ◽  
Thallium Bromide ◽  
Quantum Science ◽  
First Time ◽  
Aomori Prefecture ◽  
Zone Purification

For the first time, particle-induced X-ray emission (PIXE) spectra were obtained using TlBr detectors. The TlBr detector was fabricated from a crystal grown with material purified by the zone purification. Its active volume was 1.5 mm × 1.5 mm × 3.1 mm, and it exhibited an energy resolution of a 6.2 keV full-width at half-maximum (FWHM) for 59.5 keV at room temperature. The detector was installed into a PIXE system at Aomori Prefecture Quantum Science Center. A Pb plate target in the PIXE chamber was irradiated with a 20 MeV proton beam, and X-ray peaks for Pb K[Formula: see text] and K[Formula: see text] were successfully detected by the TlBr detector at room temperature.

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