Dresden 2000 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 19: Instrumentation und Anwendungen III
HK 19.2: Vortrag
Donnerstag, 23. März 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. Töke5 — 1HMI 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.