ABSTRACT

Table 19.1. Advantages of cobalt-60 over radium as seen in 1948 .^

1 Much softer beta radiation; easily filtered out. 2 Homogeneous gamma radiation: 1.1 M eV and 1.3 MeV. 3 W ill not leak: no gaseous daughter products. 4 Breakage almost impossible. 5 Suitable alloys of cobalt are chemically inert. 6 W ill not localise in bone: quickly eliminated. 7 Magnetic: makes handling easier and safer. 8 Strength determinable before irradiation in the atomic pile. 9 Residual activity can be 'warmed up’ in a nuclear reactor.