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Development of a reference database for beta-delayed neutron emission

Dimitriou, P.*; Dillmann, I.*; Singh, B.*; Piksaikin, V.*; Rykaczewski, K. P.*; Tain, J. L.*; Algora, A.*; Banerjee. K.*; Borzov, I. N.*; Cano-Ott, D.*; Chiba, Satoshi*; Fallot, M.*; Foligno, D.*; Grzywacz, R.*; Huang, X.*; Marketin, T.*; Minato, Futoshi  ; Mukherjee, G.*; Rasco, B. C.*; Sonzogni, A.*; Verpelli, M.*; Egorov, A.*; Estienne, M.*; Giot, L.*; Gremyachkin, D.*; Madurga, M.*; McCutchan, E. A.*; Mendoza, E.*; Mitrofanov, K. V.*; Narbonne, M.*; Romojaro, P.*; Sanchez-Caballero, A.*; Scielzo, N. D.*

$$beta$$-delayed neutron emission has been of interest since the discovery of nuclear fission. In nuclear power reactors, delayed-neutron data play a crucial role in reactor kinetics calculations and safe operation. $$beta$$-delayed neutron data also have a significant impact in the field of nuclear structure and astrophysics especially as nuclei farther away from stability are explored at the new generation of radioactive beam facilities. Several compilations of $$beta$$-decay half-lives and delayed-neutron emission probabilities are available, however, complete documentation of measurements and evaluation procedures is often missing for these properties. Efforts to address this gap in nuclear data and create an updated compilation and evaluation of $$beta$$-delayed neutron properties were undertaken under the auspices of the International Atomic Energy Agency (IAEA) which formed a Coordinated Research Project (CRP) on "Development of a Reference Database of Beta-delayed Neutron Emission Data". In this paper we summarize the work that was performed and present the results of the CRP.

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