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Directed and elliptic flow in $^{197}$Au+$^{197}$Au at intermediate energies

Abstract : Directed and elliptic flow for the Au + Au system at incident energies between 40 and 150 MeV per nucleon has been measured using the INDRA 4 pi multi-detector. For semi-central collisions, the elliptic flow of Z <= 2 particles switches from in-plane to out-of-plane enhancement at around 100 MeV per nucleon, in good agreement with the result reported by the FOPI Collaboration. The directed flow changes sign at a bombarding energy between 50 and 60 MeV per nucleon and remains negative at lower energies. The conditions for the appearance and possible origins of negative flow are discussed.
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Contributor : Suzanne Robert <>
Submitted on : Friday, February 11, 2005 - 1:32:29 PM
Last modification on : Wednesday, September 30, 2020 - 11:06:13 AM

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J. Lukasik, G. Auger, M. L. Begemann-Blaich, N. Bellaize, R. Bittiger, et al.. Directed and elliptic flow in $^{197}$Au+$^{197}$Au at intermediate energies. Physics Letters B, Elsevier, 2005, 608, pp.223-230. ⟨10.1016/j.physletb.2004.12.076⟩. ⟨in2p3-00023600⟩



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