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ASTM E526 – Standard Test Method for Measuring Fast-Neutron Reaction Rates By Radioactivation of Titanium

1.1”This test method covers procedures for measuring reaction rates by the activation reaction ^natTi(n,X)⁴⁶Sc. The ”’X”’ designation represents any combination of light particles associated with the production of the residual ⁴⁶Sc product. Within the applicable neutron energy range for fission reactor applications, this reaction is a properly normalized combination of three different reaction channels:”’⁴⁶Ti(n,p)⁴⁶Sc; ⁴⁷Ti(n, np)⁴⁶Sc; and ⁴⁷Ti(n,d)⁴⁶Sc.

Note 1:”The ⁴⁷Ti(n,np)⁴⁶Sc reaction, ENDF-6 format file/reaction identifier MF=3, MT=28, is distinguished from the ⁴⁷Ti(n,d)⁴⁶Sc reaction, ENDF-6 format file/reaction identifier MF=3/MT=104, even though it leads to the same residual product (1).2 The combined reaction, in the IRDFF-II library, has the file/reaction identifier MF=10/MT=5.