Light Nuclides Produced in the Proton-Induced Spallation of 238U at 1 GeV

Abstract

The production of light and intermediate-mass nuclides formed in the reaction 1H+238U at 1 GeV was measured at the Fragment Separator (FRS) at GSI, Darmstadt. The experiment was performed in inverse kinematics, shooting a 1 A GeV 238U beam on a thin liquid-hydrogen target. 254 isotopes of all elements in the range from Z=7 to 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.

40 pages, 16 figures, 3 tables

References in corpus (3)

• Measurement of a complete set of nuclides, cross-sections and kinetic energies in spallation of 238U 1A GeV with protons
• Complex nuclear-structure phenomena revealed from the nuclide production in fragmentation reactions
• Isotopic and velocity distributions of Bi produced in charge-pickup reactions of 208Pb at 1 A GeV

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• Experimental study of fragmentation products in the reactions 112Sn + 112Sn and 124Sn + 124Sn at 1 AGeV
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• Mach-like emission from nucleon scattering in proton-nucleus reaction