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ASTM E526

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

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Organization: ASTM
Publication Date: 1 August 2017
Status: active
Page Count: 5
ICS Code (Fissile materials and nuclear fuel technology): 27.120.30
ICS Code (Radiation measurements): 17.240
scope:

This test method covers procedures for measuring reaction rates by the activation reactions 46Ti(n,p)46Sc + 47Ti(n, np)46Sc + 47Ti(n,d)46Sc.

NOTE 1-The cross section for the 47Ti(n,np+d) reaction is relatively small for energies less than 12 MeV and is not easily distinguished from that of the 46Ti(n,p) reaction. This test method will apply to the composite natTi(n,X)46Sc reaction that is typically used for dosimetry purposes.

The reaction is useful for measuring neutrons with energies above approximately 4.4 MeV and for irradiation times, under uniform power, up to about 250 days (for longer irradiations, or for varying power levels, see Practice E261).

With suitable techniques, fission-neutron fluence rates above 109 cm-2·s-1 can be determined. However, in the presence of a high thermal-neutron fluence rate, 46Sc depletion should be investigated.

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

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.

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 E526
August 1, 2017
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
This test method covers procedures for measuring reaction rates by the activation reactions 46Ti(n,p)46Sc + 47Ti(n, np)46Sc + 47Ti(n,d)46Sc. NOTE 1—The cross section for the 47Ti(n,np+d) reaction is...
August 1, 2017
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
This test method covers procedures for measuring reaction rates by the activation reactions 46Ti(n,p) 46Sc + 47Ti(n, np)46Sc + 47Ti(n,d)46Sc. NOTE 1—The cross section for the 47Ti(n,np+d) reaction...
July 1, 2008
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
This test method covers procedures for measuring reaction rates by the activation reactions 46Ti(n,p)46Sc + 47Ti(n, np)46Sc. NOTE 1—Since the cross section for the (n,np) reaction is relatively...
July 1, 2008
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
This test method covers procedures for measuring reaction rates by the activation reactions 46Ti(n,p) 46Sc + 47Ti(n, np)46Sc. NOTE 1-Since the cross section for the (n,np) reaction is relatively...
June 10, 1997
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
This test method covers procedures for measuring reaction rates by the activation reactions46Ti (n, p)46Sc +47Ti (n, np)46Sc. NOTE 1 - Since the cross section for the (n,np) reaction is relatively...
June 10, 1997
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
1. Scope 1.1 This test method covers procedures for measuring reaction rates by the activation reactions 46Ti (n, p) 46Sc + 47Ti (n, np) 46Sc. NOTE 1--Since the cross section for the (n,np) reaction...
January 1, 1992
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Titanium
A description is not available for this item.
October 30, 1987
STANDARD TEST METHOD FOR MEASURING FAST-NEUTRON REACTION RATES BY RADIOACTIVATION OF TITANIUM
A description is not available for this item.
May 28, 1982
STANDARD METHOD FOR DETERMINING FAST-NEUTRON FLUX DENSITY BY RADIOACTIVATION OF TITANIUM (E1-1984)
A description is not available for this item.

References

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