Standard method for measuring fast-neutron flux by radioactivation of sulfur

Book · Mon Jan 01 04:00:00 EST 1973

OSTI ID:4411630

This method describes a means of measuring fast-neutron flux by activation of a sulfur threshold detector. The reaction /sup 32/S(n,p)/sup 32/P is predominant and results in a convenient beta emitter having a 14.3-d half-life. Sulflur is readily available in pure form and radioactive contamination from other elements is not a problem. There are a few competing shortlived activities from neutron interactions with its isotopes, but these can normally be eliminated by waiting 24 h before counting. With suitable techniques, fission-neutron flux in the approximate range from 10/sup 2/ to 10/sup 12/ neutrons/cm/sup 2/s can be measured. The measurement of fast-neutron fluence with sulfur is limited by the half-life of /sup 32/P to irradiation times no greater than about 20 d. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-29-010204
• OSTI ID: 4411630
• Report Number(s): ASTM-E--265-70
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*ACTIVATION DETECTORS-- STANDARDS
*NEUTRON FLUX-- ACTIVATION DETECTORS
FAST NEUTRONS
N46110* --Instrumentation--Radiation Detection Instruments-- General Detectors & Monitors
SULFUR 32 STANDARDS