Studies on fission with ALADIN - Precise and simultaneous measurement of fission yields, total kinetic energy and total prompt neutron multiplicity at GSI

Julie-Fiona Martin (1) , Julien Taieb (1) , Audrey Chatillon (1) , Gilbert Bélier (1) , Guillaume Boutoux (1) , Adeline Ebran (1) , Thomas Gorbinet (1) , Lucie Grente (1) , Benoit Laurent (1) , Eric Pellereau (1) , Héctor Alvarez-Pol (2) , Laurent Audouin (3) , Thomas Aumann , Yassid Ayyad (2) , Jose Benlliure (2) , Enrique Casarejos , Dolores Cortina Gil (2) , Manuel Caamaño (2) , F. Farget (4) , Beatriz Fernández Domínguez (2) , Andreas Heinz , Beatriz Jurado (5) , Aleksandra Kelić-Heil , Nikolaus Kurz , Chiara Nociforo , Carlos Paradela (2) , Stéphane Pietri , Diego Ramos , Jose-Luis Rodríguez-Sànchez (2) , C. Rodriguez-Tajes (4) , Dominic Rossi , Karl-Heinz Schmidt (6) , Haik Simon (6) , Laurent Tassan-Got (3) , Jossitt Vargas (2) , Bernd Voss (6) , Helmut Weick

1 DAM/DIF - DAM Île-de-France
2 USC - Universidade de Santiago de Compostela [Spain]
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 GANIL - Grand Accélérateur National d'Ions Lourds
5 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
6 GSI - Helmholtz zentrum für Schwerionenforschung GmbH

A novel technique for fission studies, based on the inverse kinematics approach, is presented. Following pioneering work in the nineties, the SOFIA Collaboration has designed and built an experimental set-up dedicated to the simultaneous measurement of isotopic yields, total kinetic energies and total prompt neutron multiplicities, by fully identifying both fission fragments in coincidence, for the very first time. This experiment, performed at GSI, permits to study the fission of a wide variety of fissioning systems, ranging from mercury to neptunium, possibly far from the valley of stability. A first experiment, performed in 2012, has provided a large array of unprecedented data regarding the nuclear fission process. An excerpt of the results is presented. With this solid starter, further improvements of the experimental set-up are considered, which are consistent with the expected developments at the GSI facility, in order to measure more fission observables in coincidence. The completeness reached in the SOFIA data, permits to scrutinize the correlations between the interesting features of fission, offering a very detailed insight in this still unraveled mechanism.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Julie-Fiona Martin, Julien Taieb, Audrey Chatillon, Gilbert Bélier, Guillaume Boutoux, et al.. Studies on fission with ALADIN - Precise and simultaneous measurement of fission yields, total kinetic energy and total prompt neutron multiplicity at GSI. European Physical Journal A, 2015, 51 (12), pp.174. ⟨10.1140/epja/i2015-15174-0⟩. ⟨in2p3-01249973⟩