Prior to World War II radioisotopes were produced in microquantities in cyclotrons and other particle accelerators. With the construction of the nuclear reactor or “Pile” an almost unlimited source of radioisotopes was created. The majority of radioisotopes are produced in the pile by (n, γ) and (n, p) nuclear reactions induced by the thermal nutrons present in the pile.
Radioactive isotopes for scientific, medical, agricultural and industrial use constitute by far the most important contribution of atomic energy to peacetime welfare. And isotopes are already at work in hundreds of places, both in our country and abroad, adding to man's knowledge of the still largely mysterious natural forces around him and significantly to his welfare.
Today, the word “isotope” is in very wide use, particularly among those working in fields where isotopes are finding some practical application, and the techniques for using them are being increasingly understood.
In our country, studies of RI techniques are developed by the imported sources from 1947. The industrial applications of radioisotopes depend on using the radio-material either (1) as a source of ionizing radiation or (2) as a tracer or (3) as a radiation chemistry.
Gaudin lectured “Radioactivity in Mineral Dressing” in London (1952). He said, “radioactivity can be put to use in mineral dressing in three ways;(1) as a research tool;(2) for the control of nod-radioactive plant processes; and (3) as a mineral-separating tool.”
Now, l explained the outlines (67 papers) of mineral dressing, coal preparation and others sectio data from which picked up the topices problems through use of radioisotopes.
There will be an increasing use of radioisotopes in physical, chemical research and its application for industry.