Fragment flow in Au+Au collisions

Journal Article · Mon Sep 11 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.2100· OSTI ID:242598

Partlan, M D; Albergo, S; Bieser, F; Brady, F P; Caccia, Z; Cebra, D; Chacon, A D; Chance, J; Choi, Y; Costa, S; Elliott, J B; Gilkes, M L; Hauger, J A; Hirsch, A S; Hjort, E L; Insolia, A; Justice, M; Keane, D; Kintner, J; Lisa, M A ; Matis, H S; McMahan, M; McParland, C; Olson, D L; Peilert, G; Porile, N T; Potenza, R; Rai, G; Rasmussen, J; Ritter, H G; Romanski, J; Romero, J L; Russo, G V; Scharenberg, R P; Scott, A; Shao, Y; Srivastava, B K; Symons, T J.M.; Tincknell, M L; Tuve, C; Wang, S; Warren, P G; Wieman, H H; Wolf, K ^[1]

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1. Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)

Exclusive measurements have been made of Au+Au reactions with beam energies ranging from 0.25{ital A} to 1.15{ital A} GeV. We present measurements of directed collective flow averaged over all light fragments with masses up to alphas, as well as separate measurements for protons, deuterons, tritons, {sup 3}He, {sup 4}He, and Li. The results show a strong increase of the directed flow with fragment mass at all energies measured. Experimental results are compared with a quantum molecular dynamics model. We find that neither the ``soft`` nor the ``hard`` equation of state can describe the data over the entire range of beam energies.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098; FG02-88ER40408; FG02-88ER40412; FG02-89ER40531
• OSTI ID: 242598
• Journal Information: Physical Review Letters, Vol. 75, Issue 11; Other Information: PBD: 11 Sep 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
GOLD 197 REACTIONS
NUCLEAR FRAGMENTS
GOLD 197 TARGET
DEUTERONS
GEV RANGE 10-100
GEV RANGE 100-1000
HELIUM 3
HELIUM 4
LITHIUM
MASS
PROTONS
TRITONS