Introduction to Modern Physics -- Coulomb Scattering -- Rutherford-Bohr Model of the Atom -- Production of X Rays -- Two--Particle Collisions -- Interactions of Charged Particles with Matter -- Interactions of Photons with Matter -- Energy Transfer and Energy Absorption in Photon Interactions with Matter -- Interactions of Neutrons with Matter -- Kinetics of Radioactive Decay -- Modes of Radioactive Decay -- Production of Radionuclides -- Waveguide Theory -- Particle Accelerators in Medicine.