Ionization-chamber intercomparison in mixed neutron and gamma-ray radiation fields by National Bureau of Standards and Armed Forces Radiobiology Research Institute. Technical report

Technical Report · Mon Dec 01 04:00:00 EST 1986

OSTI ID:6414879

Dooley, M; Goodman, L J; Zeman, G H; Schwartz, R B; Eisenhauer, C M

This report describes a dosimetry intercomparison conducted between the Armed Forces Radiobiology Research Institute (AFRRI) and the National Bureau of Standards (NBS). The project was undertaken as part of an overall program to validate the reliability and credibility of the neutron dosimetry system used with the AFRRI TRIGA reactor in support of radiobiology research. The intercomparison included adsorbed dose measurements with ionization chambers by the AFRRI Radiological Physics Division and the NBS Nuclear Radiation Division. Measurements were made at the NBS californium-252 facility using unmoderated and heavy-water-moderated configurations. At the AFRRI TRIGA reactor, measurements were done in four radiation fields, including unshielded, lead-shielded, and water-shielded configurations. All data were collected during the period July 1983 to March 1984. The agreement between results obtained by the two groups was good in the NBS californium-252 fields and excellent in the AFRRI reactor fields. Through the course of the study, the calibration procedures used at AFRRI were validated, and valuable data were collected on ionization chamber characteristics and the spatial variation of tissue kerma rates in the AFRRI reactor exposure room. This report includes descriptions of the radiation sources, dosimetry methods, dosimetry result, and special dosimetry problems encountered during the work.

• Research Organization: Armed Forces Radiobiology Research Inst., Bethesda, MD (USA)
• OSTI ID: 6414879
• Report Number(s): AD-A-178336/4/XAB; AFRRI-TR-86-3
• Country of Publication: United States
• Language: English

Related Subjects

440102* -- Radiation Instrumentation-- Radiation Dosemeters
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGY
CALIBRATION
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
COBALT 60
COBALT ISOTOPES
COMPARATIVE EVALUATIONS
DOSIMETRY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY
EVEN-EVEN NUCLEI
FERMIONS
GAMMA DOSIMETRY
HADRONS
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZATION CHAMBERS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KERMA
KINETIC ENERGY
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
MIXING
NEUTRON DOSIMETRY
NEUTRONS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
RADIATION DETECTORS
RADIATIONS
RADIOBIOLOGY
RADIOISOTOPES
RELIABILITY
THERMAL RADIATION
YEARS LIVING RADIOISOTOPES