Accession Number : AD0684456

Title :   THE ATTENUATION OF Au-198 GAMMA RAYS IN AN 11-INCH STEEL DUCT.

Descriptive Note : Technical note,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s) : Chapman,J. M.

Report Date : DEC 1966

Pagination or Media Count : 10

Abstract : Gamma-ray dose-attenuation factors were measured in an 11-inch square steel duct using a Au-198 (0.412 Mev) gamma-ray source. These attenuation factors were compared with those found using Cs-137 (0.662 Mev) and Co-60 (1.25 Mev) gamma-ray sources. It was found that the attenuation factor for Au-198 was always greater than for Cs-137. However, for short second legs, the attenuation factor for Co-60 was greater than both Au-198 and Cs-137. The measured attenuation factors for Au-198 were compared with values obtained using a computer code based on the albedo concept. It was found that calculated attenuation factors are about 20% higher than measured attenuation factors.

Descriptors :   (*DUCTS, GAMMA RAYS), (*GAMMA RAYS, ATTENUATION), NUCLEAR ENGINEERING, DOSE RATE, CONCRETE, STEEL, SHIELDING, GOLD

Subject Categories : Nuclear Radiation Shield, Protection & Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE