ASTM-E264 Historical Revision Information
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel

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


1.1 This test method describes procedures for measuring reaction rates by the activation reaction 58 Ni(n,p) 58 Co.

1.2 This activation reaction is useful for measuring neutrons with energies above approximately 2.1 MeV and for irradiation times up to about 200 days in the absence of high thermal neutron fluence rates (for longer irradiations, see Test Method E261).

1.3 With suitable techniques fission-neutron fluence rates densities above 10 cm -2 [dot]s -1 can be determined.

1.4 Detailed procedures for other fast-neutron detectors are referenced in Test Method E261.

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


Fast neutron flux; Neutron activation reactions; Nickel; Radioactivation-fast neutron flux; Threshold detectors-1 MeV; fast-neutron reaction rates by radioactivation of nickel, test; ICS Number Code 17.240 (Radiation measurements); 27.120.30 (Fissile materials and nuclear fuel technology)

To find similar documents by ASTM Volume:

12.02 (Nuclear (II), Solar, and Geothermal Energy)

To find similar documents by classification:

17.240 (Radiation measurements Including dosimetry Radiation protection, see 13.280)

27.120.30 (Fissile materials and nuclear fuel technology Including raw materials Radioactive wastes, see 13.030.30)

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Document Number


Revision Level

1992 R96 EDITION



Modification Type


Publication Date

Oct. 15, 1992

Document Type

Test Method

Page Count

3 pages

Committee Number