(1) “Authority” means the Authority on Radiation Protection created by § 7404 of this title.

(2) “Ionizing radiation” means gamma rays and x-rays, alpha and beta particles, high-speed electrons, neutrons, protons, and other nuclear particles, but not sound or radio waves or visible, infrared or ultraviolet light.

(3) “Person,” in addition to the definitions contained in § 302 of Title 1, means any public or private institution, group, agency, political subdivision of this State, any other state or political subdivision or agency thereof and any legal successor, representative, agent or agency of the foregoing, other than the United States Nuclear Regulatory Commission or any successor thereto and other than federal government agencies licensed by the United States Nuclear Regulatory Commission or any successor thereto.

(4) “Radioactive material” means any material (solid, liquid or gas) which emits ionizing radiation spontaneously.

(5) “Users of ionizing radiation” means persons who supervise the application of ionizing radiation and/or apply ionizing radiation to human beings for diagnostic and/or therapeutic purposes.