title: Study of nuclear stopping in central collisions at intermediate energies.
abstract: Nuclear stopping has been investigated in central nuclear collisions at intermediate energies by analyzing kinematically complete events recorded with the help of the 4π multidetector INDRA for a large variety of symmetric systems. It is found that the mean isotropy ratio defined as the ratio of transverse to parallel momenta (energies) reaches a minimum near the Fermi energy, saturates or slowly increases depending on the mass of the system as the beam energy increases, and then stays lower than unity, showing that significant stopping is not achieved even for the heavier systems. Close to and above the Fermi energy, experimental data show no effect of the isospin content of the interacting system. A comparison with transport model calculations reveals that the latter overestimates the stopping power at low energies.
authors.affiliation: LPC, CNRS/IN2P3, Ensicaen, Université de Caen Basse Normandie, F-14050 Caen cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Lehaut
authors.forename: D
authors.initials: D
authors.lastname: Durand
authors.forename: O
authors.initials: O
authors.lastname: Lopez
authors.forename: E
authors.initials: E
authors.lastname: Vient
authors.forename: A
authors.initials: A
authors.lastname: Chbihi
authors.forename: J D
authors.initials: JD
authors.lastname: Frankland
authors.forename: E
authors.initials: E
authors.lastname: Bonnet
authors.forename: B
authors.initials: B
authors.lastname: Borderie
authors.forename: R
authors.initials: R
authors.lastname: Bougault
authors.forename: E
authors.initials: E
authors.lastname: Galichet
authors.forename: D
authors.initials: D
authors.lastname: Guinet
authors.forename: Ph
authors.initials: P
authors.lastname: Lautesse
authors.forename: N
authors.initials: N
authors.lastname: Le Neindre
authors.forename: P
authors.initials: P
authors.lastname: Napolitani
authors.forename: M
authors.initials: M
authors.lastname: Parlog
authors.forename: M F
authors.initials: MF
authors.lastname: Rivet
authors.forename: E
authors.initials: E
authors.lastname: Rosato