FOR PHYSICIANS, these peaceful
applications took two
directions. One was the development
of artificial reactor-produced
isotopes as high energy sources for
radiation treatment. During the war
years, there had been development
of Robert van de Graaff’s million volt
static generators and Donald Kerst’s
high energy betatron, the first
supervoltage therapy machines. But
the simplicity of using cobalt 60
or cesium 137 in rotating-head