ASTM E 266 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Aluminum
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ASTM E 266 Document Information:
Title
Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Aluminum
ASTM International
Publication Date:
Jun 1, 2007
Scope:
This test method covers procedures measuring reaction rates by
the activation reaction 27
Al(n,&agr;)24Na.
This activation reaction is useful for measuring neutrons with
energies above approximately 6.5 MeV and for irradiation times up
to about 2 days (for longer irradiations, see Practice E 261).
With suitable techniques, fission-neutron fluence rates above
106 ·cm-2·s-1 can be
determined.
Detailed procedures for other fast neutron detectors are
referenced in Practice E 261.
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 and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- activation
- activation reaction
- aluminum
- cross section
- dosimetry
- fast-neutron monitor
- neutron metrology
- pressure vessel surveillance
- reaction rate
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