Light nuclides produced in the proton-induced spallation of 238U at 1 GeV

M. V. Ricciardi (1) , P. Armbruster (1) , J. Benlliure , M. Bernas (2) , A. Boudard (3) , S. Czajkowski (4) , T. Enqvist (1) , A. Kelic (1) , S. Leray (3) , R. Legrain (3) , B. Mustapha (2) , J. Pereira , F. Rejmund (1) , K.-H. Schmidt (1) , C. Stéphan (2) , L. Tassan-Got (2) , C. Volant (3) , O. Yordanov (1)

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

The production of light and intermediate-mass nuclides formed in the reaction 1H+238U at 1 GeV was measured at the Fragment Separator at GSI, Darmstadt. The experiment was performed in inverse kinematics, by shooting a 1 A GeV 238U beam on a thin liquid-hydrogen target. A total of 254 isotopes of all elements in the range 7<=Z<=37 were unambiguously identified, and the velocity distributions of the produced nuclides were determined with high precision. The results show that the nuclides are produced in a very asymmetric binary decay of heavy nuclei originating from the spallation of uranium. All the features of the produced nuclides merge with the characteristics of the fission products as their mass increases.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M. V. Ricciardi, P. Armbruster, J. Benlliure, M. Bernas, A. Boudard, et al.. Light nuclides produced in the proton-induced spallation of 238U at 1 GeV. Physical Review C, 2006, 73, pp.014607. ⟨10.1103/PhysRevC.73.014607⟩. ⟨in2p3-00025847⟩