CALIBRATION OF FOILS FOR NEUTRON FLUX MEASUREMENTS
A comprehensive foil calibration experiment was conducted. Irradiations were performed June 27 and 28, 1960, in the uniform fluxes of two different experimental facilities. The beta-counting efficiencies of end-window flow counters were determined for 25 types of foils. (amma counter efficiencies were also determined for 10 types of foils. The absolute disintegration rate of each type foil was determined by one or more of the following methods: betagamma coincidence counting, 4 pi beta counting, or by relation to a similar foil of known disintegration rate. Neutron fluxes were measured in the wet-pool pneumatic tube and at one location in the irradiation cell. The analytical neutron spectrum of the (round Test Reactor ((TR) in the pneumatic tube was verified. An intercalibration was performed in two ways: by determination of disintegration rates of calibrated gold, cobalt, and sulfur foils, and by determination of the fluxes from irradiated gold, cobalt, and sulfur foils. (auth)
- Research Organization:
- Convair, Fort Worth, Tex.
- NSA Number:
- NSA-15-022454
- OSTI ID:
- 4041002
- Report Number(s):
- NARF-61-18T; MR-N-279
- Country of Publication:
- United States
- Language:
- English
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