Evaporation residues produced in spallation of 208Pb by protons at 500 MeV

Abstract : The production cross sections of fragmentation–evaporation residues in the reaction Pb+p at Click to view the MathML source have been measured using the inverse-kinematics method and the FRS spectrometer (GSI). Fragments were identified in nuclear charge using ionisation chambers. The mass identification was performed event-by-event using the Bρ–TOF–ΔE technique. Although partially-unresolved ionic charge states induced an ambiguity on the mass of some heavy fragments, production rates could be obtained with a high accuracy by systematically accounting for the polluting ionic charge states. The contribution of multiple reactions in the target was subtracted using a new, partly self-consistent code. The isobaric distributions are found to have a shape very close to the one observed in experiments at higher energy. Kinematic properties of the fragments were also measured. The total and the isotopic cross sections, including charge-pickup cross sections, are in good agreement with previous measurements and models. The data are discussed in the light of previous spallation measurements, especially on lead at 1 GeV.
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Submitted on : Wednesday, February 22, 2006 - 9:35:41 AM
Last modification on : Saturday, April 14, 2018 - 11:46:03 AM

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L. Audouin, L. Tassan-Got, P. Armbruster, J. Benlliure, M. Bernas, et al.. Evaporation residues produced in spallation of 208Pb by protons at 500 MeV. Nuclear Physics A, Elsevier, 2006, 768, pp.1-21. ⟨10.1016/j.nuclphysa.2006.01.006⟩. ⟨in2p3-00025664⟩

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