<unk>  is a subdivision of nuclear<unk>  which is the study of the chemical effects of<unk>  on matter; this is very different from radiochemistry as no radioactivity needs to be present in the material which is being chemically changed by the<unk> . An example is the conversion of water into hydrogen gas and hydrogen peroxide.
Radiation chemistry
Biomedicine
Medicinal chemistry
Radiobiology
Bioptics 
Environmental medicine
Nuclear technology
Medicine