THE VARIATION OF DOSE ATTENUATION OF TWO-LEGGED CONCRETE DUCTS WITH INCIDENT GAMMA-RAY ENERGY.
Abstract
Gamma-ray dose attenuation factors were measured in a 3-foot square and an 11-inch square duct using Au-198 (.412 Mev), Cs-137 (.662 Mev), and Co-60 (1.25 Mev) gamma-ray sources. Attenuation factors for given geometries were compared as a function of the incident gamma-ray energy. It was found that the attenuation factor decreases monotonically with increasing energy. Measured attenuation factors were compared with values obtained using a computer code based on the albedo concept. It was found that calculated attenuation factors are high by as much as g8 percent for Au-198 in the 11-inch duct. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 16, 1965
- Accession Number
- AD0462614
Entities
People
- J. M. Chapman
Organizations
- Naval Facilities Engineering Service Center