Criticality experiments for validation of cross sections: the 237Np case L.S. Leong, L. Tassan-Got, L. Audouin, C. Paradela, J.N. Wilson, D. Tarrio, B. Berthier, I. Duran, C. Le Naour, M.O. Sornein and C. Stéphan EPJ Web of Conferences, 21 (2012) 03003 Published online: 14 February 2012 DOI: 10.1051/epjconf/20122103003