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The attainment of high specific activities is an important requirement for the detect i on and utilization of radioactivities produced by photonuclear reactions. If an element different from the target element is produced suitable chemical procedures for the separation of the radioactive atoms from the target atoms can usually be found. However, finding rapid and efficient methods for separating isotopes of the target element formed by the (y,n) reaction presents a more difficult problem. To facilitate the study of the properties of cobalt and platinum actiities produced in the synchrotron by (y,n) reactions, an attempt was made to find complexes of these elements which would undergo Szilard-Chalmers type reactions. A portion of the study was also devoted to the investigation of the activities formed by photonuclear reactions in platinum when PtCl-4.xH-2O is irradiated in the x-ray beam of the synchrotron.

High specific radioactivities of cobalt, platinum and iridium from photonuclear reactions