Prompt fission neutron spectra in the 235U(n,f) reaction

B. Mauss; J. Taïeb; B. Laurent; G. Bélier; A. Chatillon; D. Étasse; P. Morfouace; O. Roig; M. Devlin; J.A. Gomez; R. C. Haight; K. J. Kelly; J.M. O’Donnell; K.T. Schmitt

doi:10.1051/epjconf/202328401006

Proceedings

Open Access

EPJ Web of Conferences 284, 01006 (2023)
https://doi.org/10.1051/epjconf/202328401006

Prompt fission neutron spectra in the ²³⁵U(n,f) reaction

B. Mauss¹^,2^*, J. Taïeb¹^,2, B. Laurent¹, G. Bélier¹^,2, A. Chatillon¹^,2, D. Étasse³, P. Morfouace¹^,2, O. Roig¹^,2, M. Devlin⁴, J.A. Gomez⁴, R. C. Haight⁴, K. J. Kelly⁴, J.M. O’Donnell⁴ and K.T. Schmitt⁵

¹ CEA, DAM, DIF, F-91297 Arpajon, France
² Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, F-91680 Bruyères-le-Châtel, France
³ LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-Caen, France
⁴ P-27, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
⁵ ISR-1, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

^* Corresponding author: benoit.mauss@cea.fr

Published online: 26 May 2023

Abstract

Prompt fission neutron spectra (PFNS) are crucial to any neutronic simulation of critical nuclear systems. An experimental setup dedicated to the measurements of PFNS of very high accuracy was developed at the Los Alamos Neutron Science Center (LANSCE) some ten years ago. It allows for the measurement of PFNS for neutron induced fission at the Weapon Neutron Research (WNR) neutron source of the LANSCE. A measurement of the PFNS from the ²³⁵U(n,f) reaction was realized recently and is currently analyzed. Preliminary results are presented here and are compared to present nuclear data evaluations.

© The Authors, published by EDP Sciences, 2023

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.