1152-1155Irradiation of a thick cobalt target with
16O, 7Li and 12C beams consecutively produces carrier-free
radiotracers of 6ICU, 62,63Zn, 66,67Ga, 71,72
As and 73Se, which are of nutritional importance and are closely related
in the periodic table. A gold target irradiated with medium energy 7Li
and 12C produces 197Hg, 198,199,200,201Tl, 199,200,201
Pb, 204 Bi and 204,205po, which are heavy as well as toxic
in the environment. A new term, 'Tracer Packet' has been coined for such systems.
The uptake of these elements has been studied using a chelating resin, thiosemicarbazide
incorporated amberlite IRC-50