Complete characterization of the fission fragments produced in reactions induced by Pb208 projectiles on proton at 500AMeV

J. L. Rodríguez-Sánchez, J. Benlliure, J. Taïeb, H. Álvarez-Pol, L. Audouin, Y. Ayyad, G. Bélier, G. Boutoux, E. Casarejos, A. Chatillon, D. Cortina-Gil, T. Gorbinet, A. Heinz, A. Kelić-Heil, B. Laurent, J.-F. Martin, C. Paradela, E. Pellereau, B. Pietras, D. Ramos, C. Rodríguez-Tajes, D. M. Rossi, H. Simon, J. Vargas, and B. Voss
Phys. Rev. C 91, 064616 – Published 25 June 2015

Abstract

The two fragments produced in fission reactions induced by Pb208 projectiles impinging on a liquid hydrogen target at 500AMeV have been fully identified in coincidence. The experiment was performed at GSI Darmstadt, where the combined use of the inverse kinematics technique with an efficient detection setup permitted one to detect and to fully identify the fission fragments in a range from Z=27 to Z=52. The corresponding isotopic cross sections and velocities of the fission fragments were measured with high accuracy. The results are compared to state-of-the-art model calculations that reproduce the measured observables. Correlations between the two fragments were used to assess the role of charge polarization and the excitation energy gained by the nascent fragments using the neutron excess of the final fragments. The analysis of the average velocities of the fission fragments allowed us to parametrize the distance between the two fission fragments at scission as a function of the size of the fissioning system.

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  • Received 14 April 2015

DOI:https://doi.org/10.1103/PhysRevC.91.064616

©2015 American Physical Society

Authors & Affiliations

J. L. Rodríguez-Sánchez1, J. Benlliure1,*, J. Taïeb2, H. Álvarez-Pol1, L. Audouin3, Y. Ayyad1,†, G. Bélier2, G. Boutoux2,‡, E. Casarejos4, A. Chatillon2, D. Cortina-Gil1, T. Gorbinet2, A. Heinz5, A. Kelić-Heil6, B. Laurent2, J.-F. Martin2, C. Paradela1,§, E. Pellereau2, B. Pietras1, D. Ramos1, C. Rodríguez-Tajes7, D. M. Rossi6,∥, H. Simon6, J. Vargas1, and B. Voss6

  • 1Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
  • 2CEA, DAM, DIF, F-91297 Arpajon, France
  • 3Institut de Physique Nucléaire d'Orsay, F-91406 Orsay, France
  • 4Universidad de Vigo, E-36200 Vigo, Spain
  • 5Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
  • 6GSI-Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
  • 7Grand Accélérateur National d'Ions Lourds, F-14076 Caen Cedex 05, France

  • *j.benlliure@usc.es
  • Present address: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Present address: Université Bordeaux, F-33405 Talence, France.
  • §Present address: EC-JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium.
  • Present address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321, USA.

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Vol. 91, Iss. 6 — June 2015

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