Nuclear Fluid Dynamics versus Intranuclear Cascade—Possible Evidence for Collective Flow in Central High-Energy Nuclear Collisions

H. Stöcker; C. Riedel; Y. Yariv; L. P. Csernai; G. Buchwald; G. Graebner; J. A. Maruhn; W. Greiner; K. Frankel; M. Gyulassy; B. Schürmann; G. Westfall; J. D. Stevenson; J. R. Nix; D. Strottman

doi:10.1103/PhysRevLett.47.1807

Nuclear Fluid Dynamics versus Intranuclear Cascade—Possible Evidence for Collective Flow in Central High-Energy Nuclear Collisions

H. Stöcker, C. Riedel, Y. Yariv, L. P. Csernai, G. Buchwald, G. Graebner, J. A. Maruhn, W. Greiner, K. Frankel, M. Gyulassy, B. Schürmann, G. Westfall, J. D. Stevenson, J. R. Nix, and D. Strottman

Phys. Rev. Lett. 47, 1807 – Published 21 December 1981

Abstract

The predictions of a variety of current theoretical models of high-energy nuclear collisions are compared with recent experimental data for central collisions of ${}^{20}{Ne}$ on ${}^{238}U$ at $E_{lab} = 393$ MeV/u. The experimental observation of broad sideward maxima in the angular distributions of low- and medium-energy protons is reproduced by a nuclear fluid-dynamical calculation with final freezeout of the protons. In contrast, the current intranuclear-cascade and simplified collision models predict forward-peaked angular distributions.

Received 28 August 1981

DOI:https://doi.org/10.1103/PhysRevLett.47.1807

Authors & Affiliations

H. Stöcker, C. Riedel, and Y. Yariv^*

Gesellschaft für Schwerionenforschung, D-6100 Darmstadt, Germany

L. P. Csernai^†, G. Buchwald, G. Graebner, J. A. Maruhn, and W. Greiner

Institut für Theoretische Physik, J. W. Goethe Universität, D-6000 Frankfurt am Main, Germany

K. Frankel, M. Gyulassy, B. Schürmann^‡, and G. Westfall

Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

J. D. Stevenson

Space Science Laboratory, Berkeley, California 94720

J. R. Nix and D. Strottman

Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

^*On leave from Nuclear Physics Department, Weizmann Institute, Rehovot 76100, Israel.
^†On leave from Central Research Institute of Physics, H-1525 Budapest 114, Hungary.
^‡On leave from Physik Department, Technische Universität München, D-8046 Garching, Germany.