Measuring fast-neutron flux by radioactivation of iron

Journal Article · Wed Dec 31 23:00:00 EST 1980 · Annu. Book ASTM Stand.; (United States)

OSTI ID:5550052

The method describes procedures for determining neutron flux density by the activation reaction /sup 54/Fe(n,p)/sup 54/Mn. The activation reaction has a threshold of about 1.5 MeV (0.24 pJ) and can be used to determine fast neutron fluences for irradiation times up to about 3 year (90 Ms). With suitable techniques, fission neutron flux densities above 10/sup 9/ cm/sup -2/ . s/sup -1/ (10 ..mu..m . s) can be determined. However, in the presence of a high thermal-neutron flux density, /sup 54/Mn depletion should be investigated. The method includes a discussion of apparatus, reagents, materials, procedure, calculations, reporting, precision, and accuracy. (JMT)

• OSTI ID: 5550052
• Journal Information: Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 45; ISSN ABASC
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCURACY
ACTIVATION DETECTORS
BETA DECAY RADIOISOTOPES
CALCULATION METHODS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
EVEN-EVEN NUCLEI
INDUSTRY
INTERMEDIATE MASS NUCLEI
IRON 54
IRON ISOTOPES
IRRADIATION
ISOTOPES
MANGANESE 54
MANGANESE ISOTOPES
MEASURING INSTRUMENTS
MEASURING METHODS
NEUTRON DETECTORS
NEUTRON FLUENCE
NEUTRON FLUX
NUCLEAR INDUSTRY
NUCLEI
ODD-ODD NUCLEI
RADIATION DETECTORS
RADIATION FLUX
RADIOACTIVATION
RADIOISOTOPES
REAGENTS
STABLE ISOTOPES
STANDARDS
THRESHOLD ENERGY