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Dresden 2000 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 19: Instrumentation und Anwendungen III

HK 19.2: Talk

Thursday, March 23, 2000, 14:45–15:00, B 118

p(GeV)+A- Spallation Reactions in Experiment and Simulation — •C.-M. Herbach1, A. Böhm2, M. Enke1, D. Filges3, J. Galin2, F. Goldenbaum3, D. Hilscher1, U. Jahnke1, A. Letourneau2, B. Lott2, R.-D. Neef3, K. Nünighoff3, N. Paul3, A. Péghaire2, L. Pienkowski4, H. Schaal3, W.U. Schröder5, G. Sterzenbach3, V. Tishchenko1,6, A. Tietze3, and I. Töke51HMI Berlin, Glienicker Str. 100, 14109 Berlin, Germany — 2GANIL(IN2P3-CNRS,DSM-CEA),BP 5027,14076 Caen-Cedex, France — 3FZJ, 52428 Jülich, Germany — 4Warsaw University, 02-093 Warszawa, Poland — 5University of Rochester, NY, USA — 6JINR, 141980 Dubna, Russia

Protons accelerated at COSY to kinetic energies of 0.8-2.5 GeV have been used to measure production cross sections for neutrons and light charged particles (LCP’s) with thin targets (< 10 mg/cm2) ranging from Al up to U. The request to provide such data with high accuracy is a consequence of the current effort to design a new generation of neutron sources as the European Spallation Source (ESS).
Exclusive data were taken event-by-event with 4π-detectors both for neutrons and LCP’s. This allows a systematic study of the characteristic observables for different stages of the temporal evolution of the spallation reaction: inelastic collision probability, excitation energy distribution, pre-equilibrium emission, and inclusive production cross sections. Intra-nuclear-cascade-models coupled with evaporation-models have been confronted with the data. A satisfactory agreement for the production of neutrons but considerable differences for LCP’s are observed between experiment and calculations as well as between different models.

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