|Radium has gained a tremendous scientific importance with a gigantic contribution in research of radioactivity. For a very long time it was a single element used in radio medicine, constant glow phosphors manufacturing and so on. In 30-ths of 20th century its output reached 350 g per year. However in 1950-s radium was substituted by cheaper radionuclides. Nowadays it is used as a source of Radon for radon baths and in encapsulated sources of neutrons. |
In geology 228Ra and other isotopes are used for determination age of ocean sedimentary rocks. 226Ra and 228Ra are used as indicators of ocean water circulation and mixing.