Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2005-03-29
Nucl.Phys.A768:1-21,2006
Physics
Nuclear Physics
Nuclear Experiment
Scientific paper
10.1016/j.nuclphysa.2006.01.006
The production cross sections of fragmentation-evaporation residues in the reaction Pb+p at 500A MeV 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 B-rho - TOF - Delta-E 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. The data are discussed in the light of previous spallation measurements, especially on lead at 1 GeV.
Armbruster Ph.
Audouin L.
Benlliure J.
Bernas Martin
Boudard Alain
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