Simultaneous measurement of neutron-induced capture and fission reactions at CERN
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Author
Guerrero, C.
Berthoumieux, E.
Cano-Ott, D.
Mendoza, E.
Andriamonje, S.
Andrzejewski, J.
Audouin, L.
Barbagallo, M.
Becares, V.
Becvar, F.
Belloni, F.
Billowes, J.
Brugger, M.
Calviani, M.
Calvino, F.
Carrapico, C.
Cerutti, F.
Chiaveri, E.
Chin, M.
Colonna, N.
Cortes, G.
Cortes-Giraldo, M. A.
Diakaki, M.
Dillmann, I.
Domingo-Pardo, C.
Duran, I.
Eleftheriadis, C.
Fernandez-Ordonez, M.
Ferrari, A.
Ganesan, S.
Giubrone, G.
Gomez-Hornillos, M. B.
Goncalves, I. F.
Gonzalez-Romero, E.
Gramegna, F.
Griesmayer, E.
Gunsing, F.
Jenkins, D.
Jericha, E.
Kadi, Y.
Kaeppeler, F.
Karadimos, D.
Kroll, J.
Krticka, M.
Lebbos, E.
Lederer, C.
Leeb, H.
Losito, R.
Lozano, M.
Manousos, A.
Marganiec, J.
Marrone, S.
Martinez, T.
Massimi, C.
Mastinu, P. F.
Meaze, M.
Mengoni, A.
Milazzo, P. M.
Paradela, C.
Pavlik, A.
Perkowski, J.
Plag, R.
Praena, J.
Quesada, J. M.
Rauscher, T.
Reifarth, R.
Roman, F.
Rubbia, C.
Sarmento, R.
Tagliente, G.
Tain, J. L.
Tarrio, D.
Tassan-Got, L.
Tsinganis, A.
Vannini, G.
Variale, V.
Vaz, P.
Ventura, A.
Vermeullen, M.
Vlachoudis, V.
Vlastou, R.
Wallner, A.
Ware, T.
Weiss, C.
Wright, T.
Attention
2299/11658
Abstract
The measurement of the capture cross-section of fissile elements, of utmost importance for the design of innovative nuclear reactors and the management of nuclear waste, faces particular difficulties related to the.-ray background generated in the competing fission reactions. At the CERN neutron time-of-flight facility n_TOF we have combined the Total Absorption Calorimeter (TAC) capture detector with a set of three U-235 loaded MicroMegas (MGAS) fission detectors for measuring simultaneously two reactions: capture and fission. The results presented here include the determination of the three detection efficiencies involved in the process: epsilon(TAC)(n, f), epsilon(TAC)(n, gamma) and epsilon(MGAS)(n, f). In the test measurement we have succeeded in measuring simultaneously with a high total efficiency the U-235 capture and fission cross-sections, disentangling accurately the two types of reactions. The work presented here proves that accurate capture cross-section measurements of fissile isotopes are feasible at n_TOF.