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ASTM E523 PDF
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Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper
| Published by | Publication Date | Number of Pages |
| ASTM | 04/01/2021 | 4 |
ASTM E523 – Standard Test Method forMeasuring Fast-Neutron Reaction Rates by Radioactivation ofCopper
1.1”This test method covers procedures for measuring reaction rates by the activation reaction 63Cu(n,”) 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,”)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.
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