An experimental test of a large‐volume plastic detector for use in aerial gamma‐ray spectroscopy

Geophysics ◽  
1981 ◽  
Vol 46 (10) ◽  
pp. 1432-1438
Author(s):  
Joseph S. Duval ◽  
James A. Pitkin
Keyword(s):  
Gamma Radiation ◽  
Energy Resolution ◽  
Experimental Test ◽  
Large Volume ◽  
Sodium Iodide ◽  
Gamma Ray ◽  
Low Energy ◽  
Surface Distribution ◽  
Plastic Detector ◽  
Gamma Ray Spectroscopy

A large‐volume plastic detector for use in aerial gamma‐ray spectroscopy has been evaluated by the U. S. Geological Survey. The purpose of the evaluation was to compare the plastic polyvinyl toluene (PVT) detector with thallium‐activated sodium iodide [NaI(T1)] detectors in ability to define the surface distribution of gamma radiation from the decay of natural thorium, uranium, and potassium. Good performance from PVT detectors will allow aerial gamma‐ray detection to be less expensive and much less susceptible to physical or thermal shock compared to the use of NaI(T1) detectors. The experimental results indicate that PVT detectors can be used to measure the surface distribution of potassium (K), equivalent uranium (eU), and equivalent thorium (eTh). However, because of the relatively low‐energy resolution of the PVT detector and the subsequent increased interference among the energy windows used to measure K, eU, and eTh, the results of data reduction are statistically less accurate than those obtained using NaI(T1).

scholarly journals BiI3 Crystals for High Energy Resolution Gamma-Ray Spectroscopy

2017 ◽  
Author(s):  
Juan C. Nino ◽  
James Baciak ◽  
Paul Johns ◽  
Soumitra Sulekar ◽  
James Totten ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
High Energy ◽  
High Energy Resolution ◽  
Gamma Ray Spectroscopy

Perspectives of Silicon Detectors for X and Low Energy Gamma Ray Spectroscopy in Whole-Body Counting

1995 ◽  
Vol 61 (1-3) ◽  
pp. 149-152 ◽  
Author(s):  
P. Pihet ◽  
P. Berger ◽  
D. Franck ◽  
Ph. Berard ◽  
L. Le Noir de Carlan ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Low Energy ◽  
Whole Body ◽  
Silicon Detectors ◽  
Gamma Ray Spectroscopy ◽  
Energy Gamma ◽  
Body Counting ◽  
Whole Body Counting

Utilizing multi-channel airborne gamma-ray spectra

1981 ◽  
Vol 18 (12) ◽  
pp. 1793-1801 ◽  
Author(s):  
B. H. Dickson ◽  
R. C. Bailey ◽  
R. L. Grasty
Keyword(s):  
Gamma Radiation ◽  
Sodium Iodide ◽  
Gamma Ray ◽  
Experimental Studies ◽  
Basic Information ◽  
Detector Distance ◽  
Spectral Components ◽  
Absorbing Material ◽  
Sodium Iodide Detector ◽  
Source Concentration

Experimental studies using a large-volume sodium iodide detector system show how the potassium, uranium, and thorium gamma-ray spectra vary with altitude above the ground. The shapes of the spectra were derived from measurements on large radioactive concrete calibration slabs using plywood sheets to simulate the absorption of the gamma radiation in the air. A mathematical analysis of the data showed that within the range covered by the experiment (0–112 m of air) the spectra of each of the three radioelements are made up essentially of two spectral components, whose proportions vary with the amount of absorbing material between the source and the detector. With this knowledge, it is shown how all the basic information relating to source–detector distance and source concentration may be extracted from the airborne gamma-ray spectrum.

Strontium iodide scintillators for high energy resolution gamma ray spectroscopy

2008 ◽  
Author(s):  
Cody M. Wilson ◽  
Edgar V. van Loef ◽  
Jarek Glodo ◽  
Nerine Cherepy ◽  
Giulia Hull ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
High Energy ◽  
High Energy Resolution ◽  
Gamma Ray Spectroscopy

scholarly journals Bismuth-Loaded Polymer Scintillators for Gamma Ray Spectroscopy

2011 ◽  
Vol 1341 ◽  
Author(s):  
Benjmain L. Rupert ◽  
Nerine J. Cherepy ◽  
Benjamin W. Sturm ◽  
Robert D. Sanner ◽  
Zurong Dai ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
Equal Weight ◽  
Emission Maximum ◽  
Transmission Electron ◽  
Gamma Ray Spectroscopy ◽  
Small Clusters ◽  
Better Than ◽  
Triplet Harvesting

ABSTRACTWe synthesize a series of polyvinylcarbazole (PVK) monoliths containing varying loadings of triphenyl bismuth as a high-Z dopant and varying fluors, either organic or organometallic, in order to study their use as scintillators capable of gamma ray spectroscopy. A trend of increasing bismuth loading resulting in a better resolved photopeak is observed. For PVK parts with no fluor or a standard organic fluor, diphenylanthracene (DPA), increasing bismuth loading results in decreasing light yield while with samples 1 or 3 % by weight of the triplet harvesting organometallic fluor bis(4,6-difluoropyridinato-N,C2)picolinatoiridium (FIrpic) show increasing light yield with increasing bismuth loading. Our best performing PVK/ BiPh3/FIrpic scintillator with 40 wt % BiPh3 and 3 wt % FIrpic has an emission maximum of 500 nm, a light yield of ∼30,000 photons/MeV, and energy resolution better than 7% FWHM at 662 keV. Replacing the Ir complex with an equal weight of DPA produces a sample with a light yield of ∼6,000 photons/MeV, with an emission maximum at 420 nm and energy resolution of 9% at 662 keV. Transmission electron microscopy studies show that the BiPh3 forms small clusters of approximately 5 nm diameter.

Low energy prompt gamma-ray tests of a large volume BGO detector

2012 ◽  
Vol 70 (1) ◽  
pp. 222-226 ◽  
Author(s):  
A.A. Naqvi ◽  
Zameer Kalakada ◽  
M.S. Al-Anezi ◽  
M. Raashid ◽  
Khateeb-ur-Rehman ◽  
...  
Keyword(s):  
Large Volume ◽  
Gamma Ray ◽  
Low Energy ◽  
Prompt Gamma

scholarly journals Instruments optimizations for low energy Gamma-ray detection

2019 ◽  
Vol 209 ◽  
pp. 01044
Author(s):  
Gonzalo Rodriguez ◽  
Aldo Morselli
Keyword(s):  
Energy Range ◽  
Photon Energy ◽  
Chemical Evolution ◽  
Energy Resolution ◽  
Gamma Ray ◽  
Supernova Explosion ◽  
Low Energy ◽  
Previous Generation ◽  
Energy Gamma ◽  
Better Than

There is an experimental gap in the study of the non-thermal universe in the photon energy range from 0.3 to 100 MeV. We have analyzed the performance of a detector with unprecedented sensitivity, angular and energy resolution and combined with polarimetric capability to study of the most powerful Galactic and extragalactic sources and with a line sensitivity in the MeV energy range two orders of magnitude better than previous generation of instruments that can determine the origin of key isotopes fundamental for the understanding of supernova explosion and the chemical evolution of our Galaxy.

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