O ct 2 00 4 Directed and elliptic flow in 197 Au + 197 Au at intermediate energies

نویسندگان

  • F. Lavaud
  • A. Le Fèvre
  • E. Rosato
  • C. Volant
چکیده

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 4π multiPreprint submitted to Elsevier Science 21 October 2004 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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تاریخ انتشار 2004