Neutron-induced fission cross section of U-234 measured at the CERN n_TOF facility

Autor(en)

D. Karadimos, R. Vlastou, K. Ioannidis, P. Demetriou, M. Diakaki, V. Vlachoudis, P. Pavlopoulos, V. Konovalov, U. Abbondanno, G. Aerts, H. Alvarez, F. Alvarez-Velarde, S. Andriamonje, J. Andrzejewski, P. Assimakopoulos, L. Audouin, G. Badurek, P. Baumann, F. Becvar, E. Berthoumieux, F. Calvino, D. Cano-Ott, R. Capote, A. Carrillo de Albornoz, V. Chepel, E. Chiaveri, N. Colonna, G. Cortes, A. Couture, J. Cox, S. David, R. Dolfini, C. Domingo-Pardo, A. Dorochenko, W. Dridi, I. Duran, Ch Eleftheriadis, M. Embid-Segura, L. Ferrant, A. Ferrari, R. Ferreira-Marques, L. Fitzpatrick, H. Frais-Koelbl, K. Fuji, W. Furman, I. Goncalves, R. Gallino, P. Cennini, E. Gonzalez-Romero, Andreas Pavlik,

Abstrakt

The neutron-induced fission cross section of U234 has been measured at the CERN n_TOF facility relative to the standard fission cross section of U235 from 20 keV to 1.4 MeV and of U238

from 1.4 to 200 MeV. A fast ionization chamber (FIC) was used as a

fission fragment detector with a detection efficiency of no less than

97%. The high instantaneous flux and the low background characterizing

the n_TOF facility resulted in wide-energy-range data (0.02 to 200 MeV),

with high energy resolution, high statistics, and systematic

uncertainties bellow 3%. Previous investigations around the energy of

the fission threshold revealed structures attributed to β-vibrational

levels, which have been confirmed by the present measurements.

Theoretical calculations have been performed, employing the talys code with model parameters tuned to fairly reproduce the experimental data.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

National Centre for Scientific Research Demokritos (NCSR), International Atomic Energy Agency (IAEA), Pôle universitaire Léonard-de-Vinci, Università degli Studi di Torino, National Technical University of Athens (NTUA), University of Ioannina, European Organization for Nuclear Research (CERN), Joint Institute for Nuclear Research, Istituto Nazionale di Fisica Nucleare (INFN), Roma, French Alternative Energies and Atomic Energy Commission (CEA), Universidade de Santiago de Compostela (USC), Centro de Investigaciones Energeticas Medioambientales y Tecnológica, University of Lodz, Centre National De La Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Strasbourg , Charles University Prague, Universitat Politècnica de Catalunya, Universidad de Sevilla, Universidade Técnica de Lisboa, Universidade de Coimbra, University of Notre Dame, Università degli studi di Pavia, Instituto de Física Corpuscular (IFIC), Institute of Physics and Power Engineering (IPPE), Aristotle University of Thessaloniki, Fachhochschule Wiener Neustadt

Journal

Physical Review C

Band

89

Anzahl der Seiten

11

ISSN

0556-2813

DOI

https://doi.org/10.1103/PhysRevC.89.044606

Publikationsdatum

04-2014

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/98b59c84-ae80-4f6a-bf8d-f98c79a66ea7