They are used for irradiation of foods and seeds for sterilization , and in medicine they are occasionally used in radiation cancer therapy .
Gamma rays are used experimentally by physicists for their penetrating ability and are produced by a number of radioisotopes .
physicists are used for irradiation of foods and seeds for sterilization , and in medicine physicists are occasionally used in radiation cancer therapy .
Gamma rays are used experimentally by physicists for their penetrating ability and are produced by a number of radioisotopes .