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HK: Physik der Hadronen und Kerne

HK 19: Instrumentation und Anwendungen III

HK 19.3: Vortrag

Donnerstag, 23. März 2000, 15:00–15:15, B 118

Neutron production by 0.4 - 2.5 GeV proton beams on thick W, Hg and Pb targets^‡ — •A. Böhm — GANIL, 14076 Caen, France

We have measured neutron multiplicity distributions as well as reaction cross sections in 0.4, 0.8, 1.2, 1.8, and 2.5 GeV proton-induced reactions on thick W, Hg and Pb targets of different geometries. Changing the target thickness (0.5 to 35 cm) and diameter (8 to 15 cm) provides sensitivity to the different (intra- versus inter-nuclear cascade) steps in the reaction process. The motivation for this experiment is given by the need for reliable data for the target station of the European Spallation Source and for applications related to transmutation of nuclear wastes.
The measurements have been performed at the COSY-accelerator in FZ-Jülich with the 4π neutron detector BNB (Berlin Neutron Ball). This highly efficient Gd-loaded liquid scintillator detector provides neutron data with virtually no lower energy threshold.
The presented data are compared to simulations using the HERMES [1] code.
‡ Work was supported by the EU TMR-project ERB-FMRX-CT98-0244

[1] P.Cloth et al., Report Jülich 2203 (1988)