Simultaneous measurement of neutron-induced capture and fission reactions at CERN

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. and Wright, T. (2012) Simultaneous measurement of neutron-induced capture and fission reactions at CERN. European Physical Journal A: Hadrons and Nuclei, 48 (3): 29. ISSN 1434-6001

Copy

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.

Item Type	Article
Identification Number	10.1140/epja/i2012-12029-2
Additional information	Published on Open Acess by Springer
Keywords	cross-sections, simulation, total absorption calorimeter, u-235
Date Deposited	15 May 2025 12:35
Last Modified	22 Oct 2025 19:18