Neutron field measurements in phantom with foil-activation methods. Technical report, 29 November 1985-29 November 1986
The threshold neutron-foil spectrometry method, utilizing the SAND II spectrum unfolding code, was evaluated by carrying out a measurement in the standard fission-source facility, simultaneous with six (6) in-phantom measurements of neutron spectra. The foil spectrometry was done with the full set of threshold foils, mid-thorax in ER1, where a 2 in. lead wall separated reactor and phantom. A five-foil set was utilized for the phantom mid-head and phantom hip measurements in ER1, as well as for mid-thorax, mid-head and hip in ER2, free field. Calculations of the mid-thorax and mid-head spectra in ER1 and ER2 were carried out, with the source term normalized to nickel foil activations at the reactor entrance window. A simple 5-foil perturbation method for neutron dosimetry, utilizing hand calculations, was developed and evaluated for the ER1 and ER2 spectra. It appears to be the order of 6% accurate versus 3-4% for SAND II, which utilizes the best (calculated) a prior data available for spectral shape information.
- Research Organization:
- Science Applications International Corp., San Diego, CA (USA)
- OSTI ID:
- 7198046
- Report Number(s):
- AD-A-192122/0/XAB; SAIC-85-1090-R
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FISSION FOIL DETECTORS
NEUTRON DOSIMETRY
NEUTRON SPECTROSCOPY
PHANTOMS
FIELD TESTS
NEUTRONS
NICKEL
PROGRESS REPORT
RADIATION EFFECTS
SHAPE
SPECTRA
BARYONS
DOCUMENT TYPES
DOSIMETRY
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
MEASURING INSTRUMENTS
METALS
MOCKUP
NEUTRON DETECTORS
NUCLEONS
RADIATION DETECTORS
SPECTROSCOPY
STRUCTURAL MODELS
TESTING
TRANSITION ELEMENTS
440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation
654003 - Radiation & Shielding Physics- Neutron Interactions with Matter