ASTM E265-15

1.1This test method describes procedures for measuring reaction rates and fast-neutron fluences by the activation reaction ³²S(n,p)³²P.

1.2This activation reaction is useful for measuring neutrons with energies above approximately 3 MeV.

1.3With suitable techniques, fission-neutron fluences from about 5 × 10⁸ to 10¹⁶ n/cm ² can be measured.

1.4Detailed procedures for other fast-neutron detectors are described in Practice E261.

1.5This 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.