Accurate measurement of the standard $^{235}$U(n,f) cross section from thermal to 170 keV neutron energy

An accurate measurement of the $^{235}$U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using $^{6}$Li(n,t)$^{4}$He and $^{10}$B(n,a)$^{7}$Li as references. This measurement has been carried out in order to investigate a possible ov...

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Detalles Bibliográficos
Autores principales: Amaducci, S, Aberle, O, Andrzejewski, J, Audouin, L, Bacak, M, Balibrea, J, Barbagallo, M, Becvár, F, Berthoumieux, E, Billowes, J, Bosnar, D, Brown, A, Caamaño, M, Calviño, F, Calviani, M, Cano-Ott, D, Cardella, R, Casanovas, A, Cerutti, F, Chen, Y H, Chiaveri, E, Colonna, N, Cortés, G, Cortés-Giraldo, M A, Cosentino, L, Damone, L A, Diakaki, M, Domingo-Pardo, C, Dressler, R, Dupont, E, Durán, I, FernándezDomínguez, B, Ferrari, A, Ferreira, P, Finocchiaro, P, Furman, V, Göbel, K, García, A R, Gawlik, A, Gilardoni, S, Glodariu, T, Gonçalves, I F, González-Romero, E, Griesmayer, E, Guerrero, C, Gunsing, F, Harada, H, Heinitz, S, Heyse, J, Jenkins, D G, Jericha, E, Käppeler, F, Kadi, Y, Kalamara, A, Kavrigin, P, Kimura, A, Kivel, N, Knapova, I, Kokkoris, M, Krticka, M, Kurtulgil, D, Leal-Cidoncha, E, Lederer, C, Leeb, H, Lerendegui-Marco, J, Lo Meo, S, Lonsdale, S J, Macina, D, Manna, A, Marganiec, J, Martínez, T, Masi, A, Massimi, C, Mastinu, P, Mastromarco, M, Maugeri, E A, Mazzone, A, Mendoza, E, Mengoni, A, Milazzo, P M, Mingrone, F, Musumarra, A, Negret, A, Nolte, R, Oprea, A, Patronis, N, Pavlik, A, Perkowski, J, Porras, I, Praena, J, Quesada, J M, Radeck, D, Rauscher, T, Reifarth, R, Rubbia, C, Ryan, J A, Sabaté-Gilarte, M, Saxena, A, Schillebeeckx, P, Schumann, D, Sedyshev, P, Smith, A G, Sosnin, N V, Stamatopoulos, A, Tagliente, G, Tain, J L, Tarifeño-Saldivia, A, Tassan-Got, L, Valenta, S, Vannini, G, Variale, V, Vaz, P, Ventura, A, Vlachoudis, V, Vlastou, R, Wallner, A, Warren, S, Weiss, C, Woods, P J, Wright, T, Žugec, P
Lenguaje:eng
Publicado: 2020
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1051/epjconf/202023908002
http://cds.cern.ch/record/2773401
Descripción
Sumario:An accurate measurement of the $^{235}$U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using $^{6}$Li(n,t)$^{4}$He and $^{10}$B(n,a)$^{7}$Li as references. This measurement has been carried out in order to investigate a possible overestimation of the $^{235}$U fission cross section evaluation provided by most recent libraries between 10 and 30 keV. A custom experimental apparatus based on in-beam silicon detectors has been used, and a Monte Carlo simulation in GEANT4 has been employed to characterize the setup and calculate detectors efficiency. The results evidenced the presence of an overestimation in the interval between 9 and 18 keV and the new data may be used to decrease the uncertainty of $^{235}$U(n,f) cross section in the keV region.

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