Abstract
A survey of the experimental data for transitions between levels below nucleon emission threshold in medium and heavy nuclei is presented. A general classification of these transitions is proposed and it is shown that, within most of the classes defined, the experimental "reduced" transition probabilities differ by less than a factor . The data are compared with specific nuclear model predictions. Precise theoretical descriptions of the anomalous parity states involved in transitions exist in a few cases only. However it is often possible to link the observed behavior of transition rates as a function of different parameters, with qualitative model predictions.
The data available before 1 January 1965 are presented in tables including level lifetimes, quantum numbers, branching rati s, internal-conversion data, and deduced transition probabilities.
DOI:https://doi.org/10.1103/RevModPhys.38.41
©1966 American Physical Society