Nuclear Isomerism.- A. Introduction.- B. History of nuclear isomerism.- C. Radiations from isomeric nuclei.- D. Experimental methods.- I. The measurement of internal conversion coefficients.- II. Measurement of internal conversion ratios.- III Angular correlation.- IV. The measurement of isomeric half-lives.- E. Present knowledge of nuclear isomers.- F. Comparative lifetimes.- References.- Alpha Radioactivity.- A. Alpha energies and nuclear states.- I. Alpha disintegration energies.- II. Complex alpha spectra.- III. Nuclear states and nuclear models.- B. Kinetics of alpha decay (even-even type).- I. Correlations of decay rates of even-even nuclei.- II. Decay rate theory for purely central fields.- III. Decay rate theory including non-central fields.- C. Kinetics of alpha decay of odd nucleon types.- I. Correlations of decay rates of odd nuclei.- II. Alpha decay as a multibody process (the odd nuclei).- D. Illustrative individual decay schemes.- I. Alpha decay across a closed shell.- II. Alpha decay in the region of spheroidal nuclei.- General references.- The Transuranium Elements.- A. General considerations. The place of the heaviest elements in the periodic system.- I. Historical views.- II. Evidence relating to the actinide concept.- a) Chemical evidence.- b) Physical evidence.- B. The individual elements.- I. Neptunium (element 93).- a) History of neptunium.- b) Chemical properties of neptunium.- II. Plutonium (element 94).- a) History of plutonium.- b) The chemical properties of plutonium.- III. Americium (element 95).- a) History of americium.- b) Chemical properties of americium.- IV. Curium (element 96).- V. Berkelium (element 97).- VI. Californium (element 98).- VII. Einsteinium (element 99).- VIII. Fermium (element 100).- IX. Mendelevium (element 101).- C. Systematics of nuclear data in the transuranium element region.- I. Nuclear thermodynamics.- II. Regularities in the rate of alpha decay and in the energy levels observed in alpha decay processes.- III. Nuclear spins.- IV. Neutron cross-sections and spontaneous fission properties.- General references.- The Nuclear Photoeffect.- A. Sources of ?-rays and X-rays.- B. Theory of the photodisintegration of the deuteron.- C. Photodisintegration of the deuteron: Experiments.- I. Low energies.- II. Intermediate energies (15 Mev 100 Mev).- D. Photodisintegration of nuclei beyond deuterium.- I. Threshold measurements.- II. (?, p) and (?, n) cross section.- III. Theories of giant resonance.- IV. Fine structure and level widths.- V. Compound nucleus versus direct photoeffect.- VI. Effects of charge independence.- VII. High energy photoprocesses.- VIII. Special problems.- General bibliography.- Angular Correlations.- A. Introduction.- B. Mathematical preliminaries.- C. General theory of directional correlation for processes involving states of well-defined symmetry.- I. Formalism for the basic correlation process involving two successive radiations.- II. The parameters of radiation for some specific radiations.- III. Directional correlation for unpolarized radiations.- D. Particular processes involving states of well-defined symmetry.- I. Experimental investigation of directional correlation of cascade emissions.- II. Resonance reactions.- III. Angular correlations with polarized radiations.- E. Processes involving states not having well-defined symmetry.- I. Reactions and inelastic scattering.- II. Elastic scattering.- F. Internal conversion electrons.- G. Processes involving simultaneous emission or absorption of two radiations.- I. Nuclear and electromagnetic interactions.- II. ?-Decay.- H. Extra-nuclear fields.- J. Application of theory to mesons, heavy mesons and hyperons.- Index of notation.- Oriented Nuclei.- A. Oriented nuclear spin systems.- B. Production and properties of oriented nuclei.- C. Experimental results with oriented nuclei.- D. Polarized nuclear reactions.- E. The production and detection of polarized particles.- Review articles.- Sachverzeichnis (Deutsch-Englisch).- Subject Index (English-German).