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
Get Book Here
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:
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: International Atomic Energy Agency
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 104
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Book Description
This report describes facilities primarily designed for uranium exploration instruments, but also discusses the use of these facilities for the calibration of radiation protection instruments.
Author:
Publisher: Elsevier
ISBN: 0444538038
Category : Science
Languages : en
Pages : 5604
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Book Description
Treatise on Geophysics, Second Edition, is a comprehensive and in-depth study of the physics of the Earth beyond what any geophysics text has provided previously. Thoroughly revised and updated, it provides fundamental and state-of-the-art discussion of all aspects of geophysics. A highlight of the second edition is a new volume on Near Surface Geophysics that discusses the role of geophysics in the exploitation and conservation of natural resources and the assessment of degradation of natural systems by pollution. Additional features include new material in the Planets and Moon, Mantle Dynamics, Core Dynamics, Crustal and Lithosphere Dynamics, Evolution of the Earth, and Geodesy volumes. New material is also presented on the uses of Earth gravity measurements. This title is essential for professionals, researchers, professors, and advanced undergraduate and graduate students in the fields of Geophysics and Earth system science. Comprehensive and detailed coverage of all aspects of geophysics Fundamental and state-of-the-art discussions of all research topics Integration of topics into a coherent whole
Author:
Publisher:
ISBN:
Category : Atomic energy research
Languages : en
Pages : 110
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Book Description
Author: Vincenzo Pasquale
Publisher: Springer
ISBN: 3319520849
Category : Science
Languages : en
Pages : 144
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Book Description
This book, now in its second edition, offers a comprehensive and modern treatment on the background knowledge of heat transfer processes in the lithosphere. In the light of the success of the first edition, several chapters of the book have been revised and the book has been enriched with a new chapter on geothermal methods used for the inference of past climate changes.The book starts with a brief review of global tectonics and of the structure of the crust and upper mantle. Then the theory of heat conduction as well as the thermal properties and the methods for the determination of thermal conductivity and radiogenic heat are introduced. Subsequently the geothermal flow and the thermal state of the lithosphere and deep interior are analyzed. The formation, upwelling mechanisms, solidification and cooling of magmas, which can be a fundamental heat source in many geothermal systems, are reviewed. Analytical methods used for gaining information on heat and groundwater flow from the analyses of temperature depth data are also covered. Data and practical examples are supplied to facilitate the understanding of the different topics.The book is intended for Earth science graduate students and researchers.
Author: Anatoli Chepick
Publisher:
ISBN:
Category : Aeronautics in geology
Languages : en
Pages : 24
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Book Description
Tiivistelmä.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 494
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Book Description
Author: R. L. Grasty
Publisher:
ISBN:
Category : Aeronautics in earth sciences
Languages : en
Pages : 48
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Book Description
Author: Geological Survey of Canada
Publisher:
ISBN: 9780660143958
Category : Borehole gravimetry
Languages : en
Pages : 494
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Book Description
In 1978, an international consortium of scientists from Canada, Denmark, the United Kingdom, Iceland, the United States, and West Germany successfully completed a research deep drilling project in Iceland. These scientists formed the International Crustal Research Drilling Group to organize further deep drilling investigations and to compare the results with those from the Deep Sea and Ocean Drilling Projects. From 1982-85, five holes were drilled at three sites in Cyprus to study the Troodos ophiolite. The drilling was part of an integrated petrological, structural, and geophysical study of the ophiolite, involving both field mapping and diamond drilling. This report is the third of three on the project, discussing holes drilled through the pillow lava succession and giving descriptions of the cores along with other geological, geophysical, and geochemical data.
