Automatic system for the control of batch-produced 11CO2 for continuous labeling experiments

Abstract
A system for storage and continuous dispensing of constant activity 11CO2 from batch production is described. The system has been used successfully to maintain constant activity levels for 2‐h plant tracer kinetic experiments. This development now allows any existing cyclotron facility to supply a radioisotope stream continuously from a short batch irradiation. It requires no modification for use with other isotopes such as N‐13 or O‐15 in gaseous form and can be used in other biological and clinical investigations as well as the plant physiology investigations for which it was developed.