Development of a Reference Database for Beta-Delayed Neutron Emission

Beta-delayed neutron emission is important for nuclear structure and astrophysics as well reactor applications. Significant advances in experimental techniques the past two decades have led to a wealth of new measurements that remain be incorporated databases. We report on coordinated effort compile evaluate all available ?-delayed data. The different measurement been assessed data compared with semi-microscopic microscopic-macroscopic models. microscopic database has tested against aggregate total delayed yields, time-dependent group parameters 6-and 8-group re-presentation, spectra. New recommendations macroscopic delayed-neutron fissile materials interest applications are also presented. Reference Database Beta-Delayed Neutron Emission Data online at: http://www-nds.iaea.org/beta-delayed-neutron/database.html.