The CIELO Collaboration; Neutron reactions on H, O, Fe, U, and Pu

Chadwick, M. B.*; Dupont, E.*; Bauge, E.*; Blokhin, A.*; Bouland, O.*; Brown, D. A.*; Capote, R.*; Carlson, A. D.*; Danon, Y.*; De Saint Jean, C.*; Dunn, M. E.*; Fischer, U.*; Forrest, R. A.*; Frankle, S. C.*; Fukahori, Tokio  ; Ge, Z.*; Grimes, S. M.*; Hale, G. M.*; Herman, M.*; Ignatyuk, A. V.*; Ishikawa, Makoto; Iwamoto, Nobuyuki  ; Iwamoto, Osamu  ; Jandel, M.*; Jacqmin, R.*; Kawano, Toshihiko*; Kunieda, Satoshi  ; Kahler, A. C.*; Kiedrowski, B.*; Kodeli, I.*; Koning, A. J.*; Leal, L.*; Lee, Y. O.*; Lestone, J. P.*; Lubitz, C.*; MacInnes, M.*; McNabb, D.*; McKnight, R.*; Moxon, M.*; Mughabghab, S. F.*; Noguere, G.*; Palmiotti, G.*; Plompen, A.*; Pritychenko, B.*; Pronyaev, V. G.*; Rochman, D.*; Romain, P.*; Roubtsov, D.*; Schillebeeckx, P.*; Salvatores, M.*; Simakov, S.*; Soukhovitskii, E. Sh.*; Sublet, J. C.*; Talou, P.*; Thompson, I. J.*; Trkov, A.*; Vogt, R. L.*; Van der Marck, S. C.*

CIELO (Collaborative International Evaluated Library Organization) provides a new working paradigm to facilitate evaluated nuclear reaction data advances. It brings together experts from across the international nuclear reaction data community to identify and document discrepancies among existing evaluated data libraries, measured data, and model calculation interpretations, and aims to make progress in reconciling these discrepancies to create more accurate ENDF-formatted files. The focus will initially be on a small number of the highest-priority isotopes, namely H, O, Fe, U, and Pu. This paper identifies discrepancies between various evaluations of the highest priority isotopes. The evaluated data for these materials in the existing nuclear data libraries are reviewed, and some integral properties are given. The paper summarizes a program of nuclear science and computational work needed to create the new CIELO nuclear data evaluations.