~2II, Background Information - Radioactivity and Radiation (oral, insert if desired, bibliography if desired) A. The nature of radioactivity and radiation B, Mass, energy, and radiation C. Quantum and corpuscular radiation D. 1. Energy relationships, the radiation field, definition of roentgen 2. Fundamental particles Reactions of radiation with matter 1. 2. Ionization and energy transfer a, Definitions, quantitative relationships b. Specific ionization c. Chemical and physical changes Penetration, absorption, attenuation, etc. of radiation a. E. F, 3. Induced radioactivity 4. Secondary radiations The phenomenon of radioactive decay l. Modes of decay, decay chains, etc, 2. Definitions: half-life, average life, decay constant, curie, relation between mass, half-life, and curie for different isotopes Neutron radiation 1. G. Definitions, quantitative relationships Special characteristics Neutron fission and fission chain reactions JCAE 1. Fission, number of neutrons released, energy spectrum, prompt and delayed neutrons, fraction of total 2. Fission energy release, its nature and distribution by type (radiant, kinetic, potential, etc.), primary and secondary fission energy (ee

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