Measurement of (n, x n γ ) reaction cross sections in W isotopes

G. Henning (1) , Antoine Bacquias (1) , Catalin Borcea (2) , Roberto Capote (3) , Philippe Dessagne (1) , Jean-Claude Drohé (4) , Toshihiko Kawano (5) , Maëlle Kerveno (6) , Alexandru Negret (2) , Markus Nyman (4) , Adina Olacel (2) , Arjan Plompen (4) , Pascal Romain (7) , Pol Scholtes (6) , Gérard Rudolf (6)

1 DRS-IPHC - Département Recherches Subatomiques
2 NIPNE - Horia Hulubei National Institute of Physics and Nuclear Engineering
3 IAEA - International Atomic Energy Agency [Vienna]
4 JRC - European Commission - Joint Research Centre [Geel]
5 LANL - Los Alamos National Laboratory
6 IPHC - Institut Pluridisciplinaire Hubert Curien
7 DAM/DIF - DAM Île-de-France

Evaluated nuclear data bases currently used for numerical simulation for the development of nuclear reactors still present large uncertainties. Their improvement is necessary, in particular through better reaction models and nuclear data. Among the reactions of interest, (n, $x$n) reactions are of great importance for the operation of a reactor as they modify the neutron spectrum, the neutron population, and produce radioactive species. Experimental data on (n, $x$n$\gamma$ ) reaction provide strong constraints on nuclear reaction mechanism theories. Tungsten isotopes - which are deformed like actinides but do not fission - are of interest to test the models. $^{182,184,186}$W(n, $x$n$\gamma$ ) cross sections are measured; results are compared with model calculations by TALYS, EMPIRE and CoH codes.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

G. Henning, Antoine Bacquias, Catalin Borcea, Roberto Capote, Philippe Dessagne, et al.. Measurement of (n, x n γ ) reaction cross sections in W isotopes. EPJ Web of Conferences, 2017, 146, pp.11016. ⟨10.1051/epjconf/201714611016⟩. ⟨hal-02154835⟩