Neutron flux intercomparison at NBS
Journal Article
·
· J. Res. Natl. Bur. Stand.; (United States)
- National Bureau of Standards, Washington, DC
National Bureau of Standards (NBS) participation in an International Bureau of Weights and Measures (BIPM) sponsored neutron flux intercomparison is described. The efficiencies of two transfer instruments, a gas-filled /sup 3/He proportional counter and a BF/sub 3/ counter imbedded in a polyethylene sphere, were determined at neutron energies of 250 keV and 560 keV. The efficiency of the /sup 3/He detector was determined by placing it in the flux monitored by the NBS black detector. Since the polyethylene sphere detector shadows the black detector, a secondary BF/sub 3/ counter was calibrated and it normalized the sphere and black detector runs. The efficiencies are reported and compared to the quantities determined at other participating standards laboratories.
- OSTI ID:
- 5412373
- Journal Information:
- J. Res. Natl. Bur. Stand.; (United States), Journal Name: J. Res. Natl. Bur. Stand.; (United States) Vol. 83:6; ISSN JRNBA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BF3 COUNTERS
CALIBRATION
COMPARATIVE EVALUATIONS
DETECTION
EFFICIENCY
HE-3 COUNTERS
MEASURING INSTRUMENTS
NEUTRON DETECTION
NEUTRON DETECTORS
NEUTRON FLUX
PROPORTIONAL COUNTERS
RADIATION DETECTION
RADIATION DETECTORS
RADIATION FLUX
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BF3 COUNTERS
CALIBRATION
COMPARATIVE EVALUATIONS
DETECTION
EFFICIENCY
HE-3 COUNTERS
MEASURING INSTRUMENTS
NEUTRON DETECTION
NEUTRON DETECTORS
NEUTRON FLUX
PROPORTIONAL COUNTERS
RADIATION DETECTION
RADIATION DETECTORS
RADIATION FLUX