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Author: National Committee on Radiation Protection and Measurements (U.S.)
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 104
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Book Description
Author: National Committee on Radiation Protection and Measurements (U.S.)
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 104
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Book Description
Author: National Committee on Radiation Protection and Measurements (U.S.)
Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 104
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Book Description
Author: US Department of Commerce. National Bureau of Standards
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: United States. National Committee on Radiation Protection and Measurements
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 102
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Book Description
Author: US Department of Commerce. National Bureau of Standards
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: National Committee on Radiation Protection and Measurements (U. S.)
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 0
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Author: E. Tochilin
Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 38
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Book Description
Radioactive (a, n) neutron sources include Ra-Be, PuF4, and four PuBe13 sources. Comparative neutron emission rates were determined by two separate methods: (1) the manganese sulfate bath with appropriate corrections made for fast neutron escape or capture and for thermal neutron capture by the source; and (2) long counter measurements corrected for energy response and so rce anisotropy. Agreement to within 1 percent was obtained by the two independent methods. A Ra-Be source calibrated against the NBS neutron standard was used as a primary reference Spectral measurements of PuBe13 and PuF4 neutron sources were made with nuclear emulsions. By the use of cylindrical plastic and lead absorbers, an effort was made to moderate the PuBe13 spectrum and thereby obtain additional calibration points for instrument response studies. Spectral changes were initially studied with the doublemoderator technique, followed by later measurements with nuclear emulsions. From flux and spectral measurements of the primary and moderated radioactive sources, the first collision tissue dose was calculated and, in turn, compared to experimental measurements of absorbed dose with proportional counters designed according to the Bragg-Gray principle. (Author).
Author:
Publisher:
ISBN:
Category : Physical instruments
Languages : en
Pages : 204
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309075599
Category : Science
Languages : en
Pages : 211
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Book Description
The Committee on Dosimetry for the Radiation Effects Research Foundation (RERF) was set up more than a decade ago at the request of the U.S. Department of Energy. It was charged with monitoring work and experimental results related to the Dosimetry System 1986 (DS86) used by RERF to reconstruct the radiation doses to the survivors in Hiroshima and Nagasaki. At the time it was established, DS86 was believed to be the best available dosimetric system for RERF, but questions have persisted about some features, especially the estimates of neutrons resulting from the Hiroshima bomb. This book describes the current situation, the gamma-ray dosimetry, and such dosimetry issues as thermal-neutron discrepancies between measurement and calculation at various distances in Hiroshima and Nagasaki. It recommends approaches to bring those issues to closure and sets the stage for the recently convened U.S. and Japan Working Groups that will develop a new dosimetry for RERF. The book outlines the changes relating to DS86 in the past 15 years, such as improved numbers that go into, and are part of, more sophisticated calculations for determining the radiations from bombs that reach certain distances in air, and encourages incorporation of the changes into a revised dosimetry system.
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1216
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Book Description
