Nuclide Cross-Sections Of Fission Fragments In The Reaction 208Pb+p At 500 A MeV

C. Volant (1) , B. Fernandez-Dominguez (1) , P. Armbruster (2) , L. Audouin (3) , J. Benlliure , M. Bernas (3) , A. Boudard (1) , E. Casarejos , S. Czajkowski (4) , J. E. Ducret (1) , T. Enqvist , B. Jurado (2, 4) , R. Legrain (1) , S. Leray (1) , B. Mustapha (3) , J. Pereira , M. Pravikoff (4) , F. Rejmund (2, 3) , M. V. Ricciardi (2) , K.-H. Schmidt (2) , C. Stéphan (3) , J. Taieb (2, 3) , L. Tassan-Got (3) , W. Wlazlo (1)

1 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
2 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

The isotopic distributions and recoil velocities of the fission fragments produced in the spallation reaction 208Pb+p at 500 A MeV have been measured using the inverse kinematics technique. The shapes of the different distributions are found in good agreement with previously published data while the deduced total fission cross-section is higher than expected. From the experimental data, the characteristics of the average fissioning system can be reconstructed in charge, mass and excitation energy and the number of post-fission neutrons can be inferred. The results are also compared to different models describing the spallation reaction.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

C. Volant, B. Fernandez-Dominguez, P. Armbruster, L. Audouin, J. Benlliure, et al.. Nuclide Cross-Sections Of Fission Fragments In The Reaction 208Pb+p At 500 A MeV. 3rd International Workshop on Nuclear Fission and Fission-Product Spectroscopy, May 2005, Cadarache, France. pp.45-48, ⟨10.1063/1.2137226⟩. ⟨in2p3-00025277⟩