Housing for Co60 Gamma‐Ray Source For Experimental Work

A relatively simple housing for experimental work with multicurie radioactive sources consists of a lead turret on a low table, the volume below the table being shielded on three sides by stationary shielding and in front by a rolling lead door. The source capsule is screwed on to the end of a rod passing through vertical holes in the turret and the table. The source can be positioned in the center of the turret when not in use and, when desired, lowered to any position adjacent to experimental equipment below the table. Using a 40‐curie Co60 source and an annular glass irradiation vessel, an average gamma‐ray intensity of 2×105 r/hr is obtained in a 5‐ml volume of liquid.