Delayed-Neutron Data for Reactor-Physics Analysis

Recommended values for delayed-neutron data of principal interest in reactor-physics analysis are. These data are the absolute delayed-neutron yield, the delayed-neutron energy spectrum, and the group fractions and decay constants used to describe the time behavior of delayed-neutron production. The recommended values are the result of a review and evaluation of experimental data and empirical correlations. Use of these values is discussed, and several remaining problems are described.