Details

Autor(en) / Beteiligte

• Wilson, J. N.
• Lebois, M.
• Qi, L.
• Amador-Celdran, P.
• Bleuel, D.
• Briz, J. A.
• Carroll, R.
• Catford, W.
• De Witte, H.
• Doherty, D. T.
• Eloirdi, R.
• Georgiev, G.
• Gottardo, A.
• Goasduff, A.
• Hadyńska-Klęk, K.
• Hauschild, K.
• Hess, H.
• Ingeberg, V.
• Konstantinopoulos, T.
• Ljungvall, J.
• Lopez-Martens, A.
• Lorusso, G.
• Lozeva, R.
• Lutter, R.
• Marini, P.
• Matea, I.
• Materna, T.
• Mathieu, L.
• Oberstedt, A.
• Oberstedt, S.
• Panebianco, S.
• Podolyák, Zs
• Porta, A.
• Regan, P. H.
• Reiter, P.
• Rezynkina, K.
• Rose, S. J.
• Sahin, E.
• Seidlitz, M.
• Serot, O.
• Shearman, R.
• Siebeck, B.
• Siem, S.
• Smith, A. G.
• Tveten, G. M.
• Verney, D.
• Warr, N.
• Zeiser, F.
• Zielinska, M.

Titel

Anomalies in the Charge Yields of Fission Fragments from the U ( n , f ) 238 Reaction

Ist Teil von

• Physical review letters, 2017-06, Vol.118 (22), Article 222501

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

American Physical Society

Beschreibungen/Notizen

• Fast-neutron-induced fission of 238 U at an energy just above the fission threshold is studied with a novel technique which involves the coupling of a high-efficiency γ-ray spectrometer (MINIBALL) to an inverse-kinematics neutron source (LICORNE) to extract charge yields of fission fragments via γ − γ coincidence spectroscopy. Experimental data and fission models are compared and found to be in reasonable agreement for many nuclei; however, significant discrepancies of up to 600% are observed, particularly for isotopes of Sn and Mo. This indicates that these models significantly overestimate the standard 1 fission mode and suggests that spherical shell effects in the nascent fission fragments are less important for low-energy fast-neutron-induced fission than for thermal neutron-induced fission. This has consequences for understanding and modeling the fission process, for experimental nuclear structure studies of the most neutron-rich nuclei, for future energy applications (e.g., Generation IV reactors which use fast-neutron spectra), and for the reactor antineutrino anomaly. This research has been published in Physical Review Letters. © 2017 American Physical Society