Gamma-Ray Induced Radiation Damage in Large Size LSO and LYSO Crystal Samples

AbstractWith the advent of nuclear engineering, x-ray diffraction has become an important analytical tool in the study of radiation damage due to neutron and gamma-ray irradiation. The materials under study in this work have rdioactive levels up to 40 R/hr. at 17 centimeters combined β and γ. The activity of the various samples under study may be due to (n, γ) reactions or fission products or both.Data are presented to illustrate the use of sample shielding, detector shielding pulse height discrimination and the combination of all three aids in an effort to attain the most favorable peak to background ratio.

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Co/sup 60/ gamma ray irradiations of solar cells: a new way to predict space radiation damage

Proceedings of 1994 IEEE 1st World Conference on Photovoltaic Energy Conversion - WCPEC (A Joint Conference of PVSC, PVSEC and PSEC) ◽

10.1109/wcpec.1994.521648 ◽

2002 ◽

Cited By ~ 3

Author(s):

S.R. Messenger ◽

M.A. Xapsos ◽

G.P. Summers ◽

E.A. Burke

Keyword(s):

Solar Cells ◽

Radiation Damage ◽

Gamma Ray ◽

Space Radiation

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Gamma ray spectroscopy with a silicon photomultiplier and a LYSO crystal

American Journal of Physics ◽

10.1119/1.4901236 ◽

2015 ◽

Vol 83 (4) ◽

pp. 378-381 ◽

Cited By ~ 1

Author(s):

Abaz Kryemadhi ◽

Kyler Chrestay

Keyword(s):

Gamma Ray ◽

Silicon Photomultiplier ◽

Gamma Ray Spectroscopy ◽

Lyso Crystal

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Large size LSO and LYSO crystal scintillators for future high-energy physics and nuclear physics experiments

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2006.10.213 ◽

2007 ◽

Vol 572 (1) ◽

pp. 218-224 ◽

Cited By ~ 34

Author(s):

Jianming Chen ◽

Liyuan Zhang ◽

Ren-yuan Zhu

Keyword(s):

Nuclear Physics ◽

High Energy Physics ◽

High Energy ◽

Large Size ◽

Physics Experiments ◽

Energy Physics ◽

Lyso Crystal

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Radiation damage and charge collection effects in Si(Li) gamma-ray detectors

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/s0168-9002(02)01619-4 ◽

2003 ◽

Vol 496 (1) ◽

pp. 123-128 ◽

Cited By ~ 4

Author(s):

Ethan L. Hull ◽

Richard H. Pehl ◽

Craig Tindall ◽

Paul N. Luke ◽

James D. Kurfess

Keyword(s):

Radiation Damage ◽

Gamma Ray ◽

Charge Collection ◽

Gamma Ray Detectors

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Combining cross-crystal averaging and MRSAD to phase a 4354-amino-acid structure

Acta Crystallographica Section D Structural Biology ◽

10.1107/s2059798315023566 ◽

2016 ◽

Vol 72 (2) ◽

pp. 182-191

Author(s):

Jason Nicholas Busby ◽

J. Shaun Lott ◽

Santosh Panjikar

Keyword(s):

Radiation Damage ◽

Model Building ◽

Data Sets ◽

Low Resolution ◽

Data Set ◽

C Protein ◽

Large Size ◽

Anomalous Signal ◽

Difference Fourier ◽

Combined Data

The B and C proteins from the ABC toxin complex ofYersinia entomophagaform a large heterodimer that cleaves and encapsulates the C-terminal toxin domain of the C protein. Determining the structure of the complex formed by B and the N-terminal region of C was challenging owing to its large size, the non-isomorphism of different crystals and their sensitivity to radiation damage. A native data set was collected to 2.5 Å resolution and a non-isomorphous Ta6Br12-derivative data set was collected that showed strong anomalous signal at low resolution. The tantalum-cluster sites could be found, but the anomalous signal did not extend to a high enough resolution to allow model building. Selenomethionine (SeMet)-derivatized protein crystals were produced, but the high number (60) of SeMet sites and the sensitivity of the crystals to radiation damage made phasing using the SAD or MAD methods difficult. Multiple SeMet data sets were combined to provide 30-fold multiplicity, and the low-resolution phase information from the Ta6Br12data set was transferred to this combined data set by cross-crystal averaging. This allowed the Se atoms to be located in an anomalous difference Fourier map; they were then used inAuto-Rickshawfor multiple rounds of autobuilding and MRSAD.

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A fast muon tagger method for Imaging Atmospheric Cherenkov Telescopes

Journal of Physics Conference Series ◽

10.1088/1742-6596/1548/1/012036 ◽

2020 ◽

Vol 1548 (1) ◽

pp. 012036

Author(s):

L Di Venere ◽

G Giavitto ◽

F Giordano ◽

R López-Coto ◽

R Pillera

Keyword(s):

Gamma Ray ◽

High Energy ◽

Silicon Photomultiplier ◽

Cherenkov Telescopes ◽

Large Size ◽

Very High Energy ◽

Energy Gamma ◽

Design Options ◽

Very High ◽

Computation Speed

Abstract The Cherenkov Telescope Array (CTA) will be the next major observatory for Very High Energy gamma-ray astronomy. Its optical throughput calibration relies on muon Cherenkov rings. This work is aimed at developing a fast and efficient muon tagger at the camera level for the CTA telescopes. A novel technique to tag muons using the capabilities of silicon photomultiplier Compact High-Energy Camera CHEC-S, one of the design options for the camera of the small size telescopes, has been developed, studying and comparing different algorithms such as circle fitting with the Taubin method, machine learning using a neural network and simple pixel counting. Their performance in terms of efficiency and computation speed was investigated using simulations with varying levels of night sky background light. The application of the best performing method to the large size telescope camera has also been studied, to improve the speed of the muon preselection.

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