Abstract
Target remnants withZ<3 from proton-nucleus and16O-nucleus reactions at 60 and 200 GeV/nucleon were measured in the angular range from 30° to 160° (−1.7<η<1.3) employing the Plastic Ball detector. The excitation energy of the target spectator matter in central oxygen-induced collisions is found to be high enough to allow for complete disintegration of the target nucleus into fragments withZ<3. The average longitudinal momentum transfer per proton to the target in central collisions is considerably higher in the case of16O-induced reactions (≈300 MeV/c) than in proton-induced reactions (≈130 MeV/c). The baryon rapidity distributions are roughly in agreement with one-fluid hydrodynamical calculations at 60 GeV/nucleon16O+Au but are in disagreement at 200 GeV/nucleon, indicating the higher degree of transparency at the higher bombarding energy. Both, the transverse momenta of target spectators and the entropy produced in the target fragmentation region are compared to those attained in head-on collisions of two heavy nuclei at Bevalac energies. They are found to be comparable or do even exceed the values for the participant matter at beam energies of about 1–2 GeV/nucleon.
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WA 80-collab. R. Albrecht et al.: Phys. Lett. B199 (1987) 297
T.C. Awes et al.: to be submitted to Nucl. Instrum. Methods
R. Anishetty, P. Koehler, L. McLerran: Phys. Rev. D (1980) 2793
K. Aleklett, L. Sihver, W. Loveland: Phys. Lett. B 197 (1987) 34
B. Berthier et al.: Phys. Lett. B 193 (1987) 417
A. Baden et al.: Nucl. Instrum. Methods 203 (1982) 189
H.G. Baumgardt et al.: Z. Phys. A — Atoms and Nuclei 273 (1975) 359
P. Danielewicz, G. Odyniec: Phys. Lett. 129B (1985) 146
K.G.R. Doss et al.: Phys. Rev. C32 (1985) 116
K.G.R. Doss et al.: Phys. Rev. C57 (1984) 302
K.G.R. Doss et al.: submitted to Phys. Rev. C; K.H. Kampert: Kollektive Phänomene in relativistischen Schwerionenreaktionen, Ph. D. Thesis, University of Münster (1986)
K.G.R. Doss et al.: accepted for publication in Phys. Rev. C
H.H. Gutbrod et al.: Phys. Lett. 127B (1983) 317
D. Hahn, H. Stöcker: LBL-22378 preprint (1986)
K.H. Kampert, H.R. Schmidt: private communication
B. Nilsson-Almqvist, E. Stenlund: Comp. Phys. Commun. 43 (1897) 387
T. Rentzsch et al.: Mod. Phys. Lett. A, 2 (1987) 193 and private communication
WA80-Collab. H.R. Schmidt et al.: GSI-87-64 preprint (1987)
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WA 80 Collaboration., Albrecht, R., Awes, T.C. et al. Target fragmentation in proton-nucleus and16O-nucleus reactions at 60 and 200 GeV/nucleon. Z. Phys. C - Particles and Fields 38, 109–115 (1988). https://doi.org/10.1007/BF01574523
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DOI: https://doi.org/10.1007/BF01574523