Directed and elliptic flow in Au + 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.

12 pages, 6 eps figures, elsart, submitted to Phys. Lett. B

References in corpus (3)

• Transverse momentum analysis of collective motion in relativistic nuclear collisions
• Excitation function of elliptic flow in Au+Au collisions and the nuclear matter equation of state
• Transverse Velocity Scaling in Au+Au Fragmentation

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