scholarly journals Prospective constraints on Lorentz violation from ultrahigh-energy photon detection

2014 ◽  
Vol 89 (12) ◽  
Author(s):  
Grigory Rubtsov ◽  
Petr Satunin ◽  
Sergey Sibiryakov
Keyword(s):  
Lorentz Violation ◽  
Ultrahigh Energy ◽  
Energy Photon ◽  
Photon Detection

Simple coincidence technique for cosmic-ray intensity exploration via low-energy photon detection

2019 ◽  
Vol 151 ◽  
pp. 157-165
Author(s):  
J. Knezevic ◽  
D. Mrdja ◽  
K. Bikit ◽  
I. Bikit ◽  
J. Hansman ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Low Energy ◽  
Energy Photon ◽  
Photon Detection ◽  
Coincidence Technique ◽  
Cosmic Ray Intensity

scholarly journals Lorentz violation and ultrahigh-energy photons

2008 ◽  
Vol 78 (6) ◽  
Author(s):  
Matteo Galaverni ◽  
Günter Sigl
Keyword(s):  
Lorentz Violation ◽  
Ultrahigh Energy

High-Energy Photon Detection With LYSO Crystals

2008 ◽  
Vol 55 (3) ◽  
pp. 1425-1429 ◽  
Author(s):  
M. Thiel ◽  
W. M. Doring ◽  
V. Dormenev ◽  
P. Drexler ◽  
R. W. Novotny ◽  
...  
Keyword(s):  
High Energy ◽  
High Energy Photon ◽  
Energy Photon ◽  
Photon Detection

scholarly journals The Superior Responsivity Enhancement of Thin-Film Ge Photodetectors by AuNP Coatings

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 739
Author(s):  
Juin Jie Liou ◽  
Hao-Tse Hsiao ◽  
I-Cheng Yao ◽  
Jia-Syun Jheng ◽  
Chu-Hsuan Lin
Keyword(s):  
Thin Film ◽  
Mechanical Strain ◽  
Small Energy ◽  
Energy Photon ◽  
Photon Detection ◽  
Better Than

We have tried to improve the responsivity of germanium-based thin-film photodetectors. It has been shown that applying a mechanical strain to the detector led to a 46.6% enhancement on the 1550 nm detection. This improvement is better than the 1310 nm case, because the bandgap shrinkage is more beneficial to the small-energy photon detection. The AuNP coating is even more attractive for responsivity enhancement of thin-film germanium (Ge) detectors. The responsivity enhancement due to the AuNP deposition is as high as 89% and 47%, for the 1310 nm and 1550 nm detections, respectively. To the best of our knowledge, this is the best responsivity enhancement for the thin-film Ge detectors reported to date.

scholarly journals LORENTZ VIOLATION DISPERSION RELATION AND ITS APPLICATION

2009 ◽  
Vol 24 (07) ◽  
pp. 1359-1381 ◽  
Author(s):  
ZHI XIAO ◽  
BO-QIANG MA
Keyword(s):  
Dispersion Relation ◽  
Quantum Electrodynamics ◽  
Lorentz Violation ◽  
Cosmic Ray ◽  
Ultrahigh Energy ◽  
Standard Model Extension ◽  
Modified Dispersion Relation ◽  
Model Extension ◽  
The Standard Model ◽  
Spinor Formalism

We derive a modified dispersion relation (MDR) in the Lorentz violation extension of the quantum electrodynamics (QED) sector in the standard model extension (SME) framework. Based on the extended Dirac equation and corresponding MDR, we observe the resemblance of the Lorentz violation coupling to spin–gravity coupling. We also develop a neutrino oscillation mechanism induced by the presence of nondiagonal terms of Lorentz violation couplings in two-flavor space in a two-spinor formalism by explicitly assuming neutrinos to be Marjorana fermions. We also obtain a very stringent bound (∽ 10-25) on one of the Lorentz violation parameters by applying the MDR to the ultrahigh energy cosmic ray (UHECR) problem.

Iodine-131 imaging using 284 keV photons with a small animal CZT-SPECT system dedicated to low-medium-energy photon detection

2015 ◽  
Vol 30 (2) ◽  
pp. 169-175 ◽  
Author(s):  
Akihiro Kojima ◽  
Kumiko Gotoh ◽  
Masako Shimamoto ◽  
Koki Hasegawa ◽  
Seiji Okada
Keyword(s):  
Small Animal ◽  
Medium Energy ◽  
Energy Photon ◽  
Photon Detection ◽  
Iodine 131 ◽  
Czt Spect ◽  
Spect System
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