Radiological Considerations in the Transport, Use, and Acceleration of Isotopes for Radioactive Ion Beams
C. A. Donahue, R. F. Fairchild, II
Berkeley Experiments with Accelerated Radioactive Species (BEARS) is an initiative to develop Radioactive Ion Beams (RIBs) capabilities at the 88-inch Cyclotron at Ernest Orlando Lawrence Berkeley National Laboratory (Berkeley Lab). RIBs offer new opportunities for research into nuclear structure, condensed matter physics, and nuclear astrophysics. The BEARS system in development involves the production of light-mass, proton-rich species using the 10-MeV proton beam of the Biomedical Positron Emission Tomography (PET) Cyclotron at Berkeley Lab. The radioactive material produced includes, 20-minute C-11, 10-minute N-13, and 70-second O-14, which will be continually transported to the 88-inch Cyclotron form the Biomedical Cyclotron via a gas-jet capillary. The transport line will be installed above ground for most of the 300-meter distance between the two facilities. This paper will provide an overview of the BEARS gas-jet transport technique focusing on the health physics concerns associated with this research. Health physics concerns include the shielding of the 0.511 MeV positron annihilation radiation; the containment of gaseous radioactive material produces; the design, shielding, and posting of the transport line; and the monitoring of the effluent.
This abstract was presented at the 32nd Annual Midyear Meeting, "Creation and Future Legacy of Stockpile Stewardship Isotope Production, Applications, and Consumption", Isotope Production, Applications, and Safety Session, 1/24/1999 - 1/27/1999, held in Albuquerque, NM.