GEOMETRY AND BARRIER ATTENUATION GENERATED BY A VERTICAL SLAB EXPOSED TO A PLANE Co$sup 60$ SOURCE
Technical Report
·
OSTI ID:4134587
S>A solution to the problem of determining the dose received by a detector with a vertical barrier interposed between it and a horizontal infinite radiation field was attempted. Steel barriers of effective mass thickness 0 to 73 lb/ft/sup 2/ were employed. The detector was collimated so that regardless of its distance from the barrier it always saw a constant circular area on the barrier. The infinite radiation field was simulated by a traveling Co/sup 60/ source that was pumped through an array of plastic tubing that covered a 100-ft semicircular area. An extrapolation to the infinite field case was attempted. The final results are expressed as ratios of dose received by a collimated, shielded detector relative to the free-in-air dose received by an unprotected detector 3 ft above the plane. The experimental points are compared to theoretical curves. (auth)
- Research Organization:
- Naval Radiological Defense Lab., San Francisco
- NSA Number:
- NSA-18-007847
- OSTI ID:
- 4134587
- Report Number(s):
- USNRDL-TR-677; AD-424495
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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