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ASTM International - ASTM E523-21

Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper

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Organization: ASTM International
Publication Date: 1 April 2021
Status: inactive
Page Count: 4
ICS Code (Radiation measurements): 17.240
ICS Code (Fissile materials and nuclear fuel technology): 27.120.30
significance And Use:

5.1Â Refer to Guide E844 for the selection, irradiation, and quality control of neutron dosimeters.

5.2Â Refer to Practice E261 for a general discussion of the measurement of fast neutron... View More

scope:

1.1 This test method covers procedures for measuring reaction rates by the activation reaction 63Cu(n,α) 60Co. The cross section for 60Co produced in this reaction increases rapidly with neutrons having energies greater than about 4.5 MeV. 60Co decays with a half-life of 5.2711(8)2 years (1)3,4 and emits two gamma rays having energies of 1.173228(3) and 1.332492(4) MeV (1). The isotopic content of natural copper is 69.174(20) % 63Cu and 30.826(20) % 65Cu (2). The neutron reaction, 63Cu(n,γ)64Cu, produces a radioactive product that emits gamma rays [1.34577(6) MeV (E1005)] which might interfere with the counting of the 60Co gamma rays.

1.2 With suitable techniques, fission-neutron fluence rates above 109 cmâˆ'2·sâˆ'1 can be determined. The 63Cu(n,α)60Co reaction can be used to determine fast-neutron fluences for irradiation times up to about 15 years, provided that the analysis methods described in Practice E261 are followed. If dosimeters are analyzed after irradiation periods longer than 15 years, the information inferred about the fluence during irradiation periods more than 15 years before the end of the irradiation should not be relied upon without supporting data from dosimeters withdrawn earlier.

1.3Â Detailed procedures for other fast-neutron detectors are referenced in Practice E261.

1.4Â This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5Â This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

ASTM E523-21
April 1, 2021
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
5.1Â Refer to Guide E844 for the selection, irradiation, and quality control of neutron dosimeters. 5.2Â Refer to Practice E261 for a general discussion of the measurement of fast neutron fluence...
April 1, 2021
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
5.1Â Refer to Guide E844 for the selection, irradiation, and quality control of neutron dosimeters. 5.2Â Refer to Practice E261 for a general discussion of the measurement of fast neutron fluence...
December 1, 2016
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
5.1 Refer to Guide E844 for the selection, irradiation, and quality control of neutron dosimeters. 5.2 Refer to Practice E261 for a general discussion of the measurement of fast neutron fluence rate...
June 1, 2011
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
Refer to Guide E844 for the selection, irradiation, and quality control of neutron dosimeters. Refer to Practice E261 for a general discussion of the measurement of fast neutron fluence rate with...
June 1, 2007
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
Refer to Guide E 844 for the selection, irradiation, and quality control of neutron dosimeters. Refer to Practice E 261 for a general discussion of the measurement of fast neutron fluence rate with...
June 10, 2002
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
1.1 This test method covers procedures for measuring reaction rates by the activation reaction 63Cu(n,alpha)60Co. The cross section for 60Co produced in this reaction increases rapidly with neutrons...
June 10, 2001
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
1.1 This test method covers procedures for measuring reaction rates by the activation reaction 63Cu(n,alpha)60Co. The cross section for 60Co produced in this reaction increases rapidly with neutrons...
June 10, 2001
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
1.1 This test method covers procedures for measuring reaction rates by the activation reaction 63Cu(n,alpha)60Co. The cross section for 60Co produced in this reaction increases rapidly with neutrons...
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