Fragmentation-induced fission reactions of ²³⁶U in inverse kinematics to investigate the pre-fragment angular momentum parameterizations

¹ IGFAE, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
² CITENI, Campus Industrial de Ferrol, Universidade da Coruña, E-15403 Ferrol, Spain
³ CEA, DAM, DIF, F-91297 Arpajon, France
⁴ IPN Orsay, 15 rue Georges Clemenceau, F-91406 Orsay, France
⁵ CINTECX, Universidade de Vigo, DSN, E-36310 Vigo, Spain
⁶ CNRS, GANIL, Bd H. Becquerel, F-14076 Caen, France
⁷ Institutionen för Fysik, Chalmers Tekniska Högskola, 412 96 Göteborg, Sweden
⁸ CNRS, CENBG, F-33175 Gradignan, France
⁹ GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, D-64291 Darmstadt, Germany
¹⁰ Technische Universität Darmstadt, Fachbereich Physik, Institut für Kernphysik, D-64289 Darmstadt, Germany

^a Corresponding author: j.l.rodriguez.sanchez@udc.es

Published online: 8 December 2023

Abstract

In the last decades, measurements of spallation, fragmentation and Coulex induced fission reactions in inverse kinematics have provided valuable data to accurately investigate the fission dynamics and nuclear structure at large deformations of a large variety of stable and non-stable heavy nuclei. The collected data were used to constrain dynamic and nuclear structure parameters of different de-excitation models, such as ABLA and GEF, but the data can also be used to constrain the parameterizations describing the pre-fragment properties after the nuclear collision, such as the angular momentum gained by the pre-fragment. In this work, the fissioning system yields are compared to calculations assuming different parameterizations for modeling the angular momentum gained by the compound nuclei. Our findings indicate that the parameterizations utilized by abrasion models clearly underestimate the angular momentum, resulting in the underestimation of the production of lighter fissioning systems.