scholarly journals Scintillator Pixel Detectors for Measurement of Compton Scattering

2019 ◽  
Vol 4 (1) ◽  
pp. 24 ◽  
Author(s):  
Mihael Makek ◽  
Damir Bosnar ◽  
Luka Pavelić
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Environment Monitoring ◽  
Silicon Photomultiplier ◽  
Pixel Detectors ◽  
Coincidence Mode ◽  
Fundamental Research ◽  
Cost Efficient ◽  
Electronic Channels ◽  
Coincidence Time

The Compton scattering of gamma rays is commonly detected using two detector layers, the first for detection of the recoil electron and the second for the scattered gamma. We have assembled detector modules consisting of scintillation pixels, which are able to detect and reconstruct the Compton scattering of gammas with only one readout layer. This substantially reduces the number of electronic channels and opens the possibility to construct cost-efficient Compton scattering detectors for various applications such as medical imaging, environment monitoring, or fundamental research. A module consists of a 4 × 4 matrix of lutetium fine silicate scintillators and is read out by a matching silicon photomultiplier array. Two modules have been tested with a 22 Na source in coincidence mode, and the performance in the detection of 511 keV gamma Compton scattering has been evaluated. The results show that Compton events can be clearly distinguished with a mean energy resolution of 12.2% ± 0.7% in a module and a coincidence time resolution of 0 . 56 ± 0 . 02 ns between the two modules.

scholarly journals Measurements of Neutrons from Photonuclear Reactions Using Laser Compton Scattering Gamma Rays

2018 ◽  
Vol 13 (0) ◽  
pp. 2404066-2404066
Author(s):  
Shuji MIYAMOTO ◽  
Akinori TAKEMOTO ◽  
Masashi YAMAGUCHI ◽  
Kento SUGITA ◽  
Satoshi HASHIMOTO ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Photonuclear Reactions ◽  
Laser Compton Scattering

scholarly journals Compact lightweight imager of both gamma rays and neutrons based on a pixelated stilbene scintillator coupled to a silicon photomultiplier array

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jihwan Boo ◽  
Mark D. Hammig ◽  
Manhee Jeong
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Sampling Rate ◽  
High Sensitivity ◽  
Pulse Shape Discrimination ◽  
Nuclear Materials ◽  
Silicon Photomultiplier ◽  
Analog To Digital ◽  
Particle Imaging ◽  
Imaging Plane

AbstractDual particle imaging, in which both neutrons and gamma-rays in the environment can be individually characterized, is particularly attractive for monitoring mixed radiation emitters such as special nuclear materials (SNM). Effective SNM localization and detection benefits from high instrument sensitivity so that real-time imaging or imaging with a limited number of acquired events is enabled. For portable applications, one also desires a dual particle imager (DPI) that is readily deployable. We have developed a hand-held type DPI equipped with a pixelated stilbene-silicon photomultiplier (SiPM) array module and low sampling-rate analog-to-digital converters (ADCs) processed via a multiplexed readout. The stilbene-SiPM array (12 × 12 pixels) is capable of effectively performing pulse shape discrimination (PSD) between gamma-ray and neutron events and neutron/gamma-ray source localization on the imaging plane, as demonstrated with 252Cf neutron/gamma and 137Cs gamma-ray sources. The low sampling rate ADCs connected to the stilbene-SiPM array module result in a compact instrument with high sensitivity that provides a gamma-ray image of a 137Cs source, producing 6.4 μR/h at 1 m, in less than 69 s. A neutron image for a 3.5 × 105 n/s 252Cf source can also be obtained in less than 6 min at 1 m from the center of the system. The instrument images successfully with field of view of 50° and provides angular resolution of 6.8°.

scholarly journals Energy Calibration of the NewSUBARU Storage Ring for Laser Compton-Scattering Gamma Rays and Applications

2014 ◽  
Vol 61 (3) ◽  
pp. 1252-1258 ◽  
Author(s):  
Hiroaki Utsunomiya ◽  
Tatsushi Shima ◽  
Keiji Takahisa ◽  
Dan Mihai Filipescu ◽  
Ovidiu Tesileanu ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Storage Ring ◽  
Gamma Rays ◽  
Energy Calibration ◽  
Laser Compton Scattering

scholarly journals Gamma Rays from Compton Scattering in the Jets of Microquasars: Application to LS 5039

2006 ◽  
Vol 643 (2) ◽  
pp. 1081-1097 ◽  
Author(s):  
Charles D. Dermer ◽  
Markus Bottcher
Keyword(s):  
Compton Scattering ◽  
Gamma Rays

Photo-nuclear Science using laser Compton scattering gamma-rays in JAEA

2008 ◽  
Author(s):  
Takehito Hayakawa ◽  
Ryoichi Hajima ◽  
Sergei V. Bulanov ◽  
H. Daido
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Nuclear Science ◽  
Laser Compton Scattering

scholarly journals A MODEL-INDEPENDENT METHOD TO STUDY DARK MATTER INDUCED LEPTONS AND GAMMA RAYS

2012 ◽  
Vol 27 (35) ◽  
pp. 1250206 ◽  
Author(s):  
MINGXING LUO ◽  
LIUCHENG WANG ◽  
GUOHUAI ZHU
Keyword(s):  
Dark Matter ◽  
Compton Scattering ◽  
Gamma Rays ◽  
Particle Physics ◽  
Cosmic Ray ◽  
Propagation Model ◽  
Strong Constraint ◽  
Inverse Compton Scattering ◽  
Inverse Compton ◽  
Model Independent

By using recent data, we directly determine the dark matter (DM)-induced e± spectrum at the source from experimental measurements at the earth, without reference to specific particle physics models. The DM-induced gamma rays emitted via inverse Compton scattering are then obtained in a model-independent way. However, the results depend on the choice of the astrophysical e± background, which is not reliably known. Nevertheless, we calculate, as an illustration, the fluxes of gamma rays from the Fornax cluster in the decaying DM scenario with various astrophysical e± backgrounds. Without any assumptions on details of the DM model, the predictions turn out to be either in disagreement with or only marginally below the upper limits measured recently by the Fermi-LAT Collaboration. In addition, these DM-induced ICS gamma rays in the GeV range are shown to be almost independent of choices of cosmic ray propagation model and of DM density profile, when a given astrophysical e± background is assumed. This provides a strong constraint on decaying DM scenario as the gamma rays may be produced in other processes besides inverse Compton scattering, such as the bremsstrahlung and neutral pion decays.

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