Transportable Calibration Pads for Ground and Airborne Gamma-ray Spectrometers PDF Download
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Author: R. L. Grasty
Publisher: Geological Survey of Canada
ISBN:
Category : Science
Languages : en
Pages : 36
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Book Description
The Geological Survey of Canada has been involved with the calibration of ground and airborne gamma-ray spectrometers since it constructed the first calibration facility for airborne spectrometers in 1968. Recent analysis of the calibration data obtained from the GSC facilities at Uplands airport, Ottawa, showed that the calibration constants were poorly known because of uncertainties in the radioelement concentrations of the pads. To improve the Canadian calibration facilities for both ground and airborne gamma-ray spectrometers, small sets of transportable pads 1 m x 1 m x 30 cm and weighing about 675 kg were constructed specially for calibrating portable spectrometers in the summer of 1988. Because of problems of radon leakage and inhomogeneities in the pads, a new set of uranium pads was constructed in the summer of 1989. This paper describes the design and construction of these small transportable pads and shows how they can be used for the calibration of both ground and airborne gamma-ray spectrometers.
Author: R. L. Grasty
Publisher: Geological Survey of Canada
ISBN:
Category : Science
Languages : en
Pages : 36
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Book Description
The Geological Survey of Canada has been involved with the calibration of ground and airborne gamma-ray spectrometers since it constructed the first calibration facility for airborne spectrometers in 1968. Recent analysis of the calibration data obtained from the GSC facilities at Uplands airport, Ottawa, showed that the calibration constants were poorly known because of uncertainties in the radioelement concentrations of the pads. To improve the Canadian calibration facilities for both ground and airborne gamma-ray spectrometers, small sets of transportable pads 1 m x 1 m x 30 cm and weighing about 675 kg were constructed specially for calibrating portable spectrometers in the summer of 1988. Because of problems of radon leakage and inhomogeneities in the pads, a new set of uranium pads was constructed in the summer of 1989. This paper describes the design and construction of these small transportable pads and shows how they can be used for the calibration of both ground and airborne gamma-ray spectrometers.
Author: Leif Lovborg
Publisher:
ISBN: 9788755010437
Category :
Languages : en
Pages : 207
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Book Description
Author: R. L. Grasty
Publisher:
ISBN:
Category : Gamma ray spectrometer
Languages : en
Pages : 36
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Book Description
The calibration of field gamma-ray spectrometers require radioactive sources of effectively infinite size. Five large radioactive calibration slabs have been constructed for this purpose and the techniques used to determine the sensitivities and Compton scattering coefficients of field gamma-ray spectrometers are described. Results obtained for 3 gamma-ray spectrometers, used by the Geological Survey of Canda, are presented.
Author: R. L. Grasty
Publisher:
ISBN:
Category : Aeronautics in earth sciences
Languages : en
Pages : 48
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Book Description
Author: R. L. Grasty
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 132
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Book Description
Four concrete pads 7.6 m x 7.6 m x 0.5 m thick were constructed in Thailandfor calibration of airborne gamma-ray spectrometers. They comprised a lowradioactivity background pad, a potassium pad, a uranium pad and a thoriumpad. The background pad was constructed of masonry sand and cement, theuranium and thorium pads with a small quantity of uranium and thorium oreadded to the same background matrix, and the potassium pad from feldspar andcement. The uranium ore, from Canada, was in radioactive equilibrium and alow emanator of radon. The thorium ore, a separated monazite beach sand, andthe feldspar were both obtained in Thailand. This report presents a detailed account of calibration pad construction.
Author: R. L. Grasty
Publisher: Energy, Mines and Resources Canada
ISBN:
Category : Gamma ray spectrometer
Languages : en
Pages : 9
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Book Description
Author: International Atomic Energy Agency
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 116
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Book Description
Author: Geological Survey of Canada
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Geological Survey of Canada
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Atomic energy research
Languages : en
Pages : 110
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Book Description
