Description
Class G21G : CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
Subclass 1/06: Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation, or particle bombardment, e.g. producing radioactive isotopes (by thermonuclear reactions in nuclear reactors G21B ; conversion of nuclear fuel in nuclear reactors G21C ) outside of nuclear reactors or particle accelerators by neutron irradiation