Research and Development.

Nuclides generated by the fission of a heavy atom (235Uranium or 239Plutonium) which breaks into

Prevention of technical risks and nuisances (Prévention des Risques et Nuisances Technologiques).

This refers to a programme of experiments jointly developed by several members of the JHR

Interval of time required for one-half of the atomic nuclei in a radioactive sample to