nucleonics

noun (used with a singular verb)

1. the branch of science that deals with nuclear phenomena, as radioactivity, fission, or fusion, especially practical applications, as in industrial engineering.

noun

1. (functioning as singular) the branch of physics concerned with the applications of nuclear energy

1. The study of the quantum behavior of atomic nuclei, in particular of the transitions they make between discrete energy levels as they emit and give off radiation.
2. Development of instruments for use in nuclear research.