The $^{236}$U neutron capture cross-section measured at the n_TOF CERN facility

M. Mastromarco , M. Barbagallo , M.J. Vermeulen , N. Colonna , S. Altstadt , J. Andrzejewski , L. Audouin (1) , V. Bécares , F. Bečvář , F. Belloni (2) , E. Berthoumieux (2) , J. Billowes , D. Bosnar , M. Brugger , F. Calviño , M. Calviani , D. Cano-Ott , C. Carrapiço , F. Cerutti , E. Chiaveri (2) , M. Chin , G. Cortés , M.A. Cortés-Giraldo , M. Diakaki , C. Domingo-Pardo , I. Durán , N. Dzysiuk , C. Eleftheriadis , A. Ferrari , K. Fraval (2) , V. Furman , M.B. Gómez-Hornillos , S. Ganesan , A.R. García , G. Giubrone , I.F. Gonçalves , E. González , A. Goverdovski , E. Griesmayer , C. Guerrero , F. Gunsing (2) , P. Gurusamy , T. Heftrich , S. Heinitz , A. Hernández-Prieto , J. Heyse , D.G. Jenkins , E. Jericha , F. Käppeler , Y. Kadi , D. Karadimos , T. Katabuchi , V. Ketlerov , V. Khryachkov , P. Koehler , M. Kokkoris , J. Kroll , M. Krtička , C. Lampoudis (2) , C. Langer , E. Leal-Cidoncha , C. Lederer , H. Leeb , L.S. Leong (1) , J. Lerendegui-Marco , M. Licata , R. Losito , A. Manousos , J. Marganiec , T. Martínez , C. Massimi , P. Mastinu , E. Mendoza , A. Mengoni , P.M. Milazzo , F. Mingrone , M. Mirea , W. Mondelaers , C. Paradela , A. Pavlik , J. Perkowski , A.J.M. Plompen , J. Praena , J.M. Quesada , T. Rauscher , R. Reifarth , A. Riego-Perez , M. Robles , F. Roman , C. Rubbia , J.A. Ryan , M. Sabaté-Gilarte , R. Sarmento , A. Saxena , P. Schillebeeckx , S. Schmidt , D. Schumann , P. Sedyshev , G. Tagliente , J.L. Tain , A. Tarifeño-Saldivia , D. Tarrío , L. Tassan-Got (1) , A. Tsinganis , S. Valenta , G. Vannini , V. Variale , P. Vaz , A. Ventura , R. Versaci , V. Vlachoudis , R. Vlastou , A. Wallner , T. Ware , M. Weigand , C. Weiss , T. Wright , P. Žugec

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

The $^{236}$U isotope plays an important role in nuclear systems, both for future and currently operating ones. The actual knowledge of the capture reaction of this isotope is satisfactory in the thermal region, but it is considered insufficient for Fast Reactor and ADS applications. For this reason the $^{236} \text{U}(n, \gamma)$ reaction cross-section has been measured for the first time in the whole energy region from thermal energy up to 1 MeV at the n_TOF facility with two different detection systems: an array of C$_6$D$_6$ detectors, employing the total energy deposited method, and a 4$\pi$ total absorption calorimeter (TAC), made of 40 BaF$_2$ crystals. The two n_TOF data sets agree with each other within the statistical uncertainty in the Resolved Resonance Region up to 800 eV, while sizable differences (up to ≃ 20%) are found relative to the current evaluated data libraries. Moreover two new resonances have been found in the n_TOF data. In the Unresolved Resonance Region up to 200 keV, the n_TOF results show a reasonable agreement with previous measurements and evaluated data.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M. Mastromarco, M. Barbagallo, M.J. Vermeulen, N. Colonna, S. Altstadt, et al.. The $^{236}$U neutron capture cross-section measured at the n_TOF CERN facility. ND 2016 International Conference on Nuclear Data for Science and Technology, Sep 2016, Bruges, Belgium. pp.11054, ⟨10.1051/epjconf/201714611054⟩. ⟨hal-01781957⟩