Stopping and radial flow in central $^{58}$Ni + $^{58}$Ni collisions between 1A and 2A GeV
| Autor: | Hong, B., Herrmann, N., Ritman, J.L., Best, D., Gobbi, A., Hildenbrand, K.D., Kirejczyk, M., Leifels, Y., Pinkenburg, C., Reisdorf, W., Schull, D., Sodan, U., Wang, G.S., Wienold, T., Alard, J-P., Amouroux, V., Bastid, N., Belyaev, I., Berek, G., Biegansky, J., Buta, A., Coffin, J.P., Crochet, P., Dona, R., Dupieux, P., Eskef, M., Fintz, P., Fodor, Z., Fraysse, L., Genoux-Lubain, A., Goebels, G., Guillaume, G., Hafele, E., Jundt, F., Kecskemeti, J., Korolija, M., Kotte, R., Kuhn, C., Lebedev, A., Legrand, I., Maazouzi, C., Manko, V., Mosner, J., Mohren, S., Neubert, W., Pelte, D., Petrovici, M., Pras, P., Rami, F., Roy, C., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Somov, A., Tizniti, L., Trzaska, M., Vasilev, M.A., Wagner, P., Wohlfarth, D., Zhilin, A. |
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| Přispěvatelé: | Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), FOPI, Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
nucleus-nucleus collisions
heavy-ion collisions subthreshold kaon production Baryon distributions Au+au collisions matter equation pion-production state expansion probe Nuclear Theory [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] Physics::Accelerator Physics High Energy Physics::Experiment Nuclear Experiment |
| Zdroj: | Physical Review C Physical Review C, American Physical Society, 1998, 57, pp.244-253 Physical Review C, 1998, 57, pp.244-253 |
| ISSN: | 2469-9985 2469-9993 0556-2813 1089-490X |
| Popis: | The production of charged pions, protons. and deuterons has been studied in central collisions of Ni-58 on Ni-58 at incident beam energies of 1.06A, 1.45A, and 1.93A GeV. The dependence of transverse-momentum and rapidity spectra on the beam energy and on the centrality of the collison is presented. It is shown that the scaling of the mean rapidity shift of protons established for between 10A and 200A GeV at the Brookhaven AGS and the CERN SPS accelerators energies is valid down to 1A GeV. The degree of nuclear stopping is discussed ; quantum molecular dynamics calculations reproduce the measured proton rapidity spectra for the most central events reasonably well, but do not show any sensitivity between the soft and the hard equation of state. A radial Bow analysis, using the midrapidity transverse-momentum spectra, delivers freeze-out temperatures T and radial flow velocities beta(r) which increase with beam energy up to 2A GeV ; in comparison to the existing data of Au on Au over a large range of energies, only beta(r) shows a system size dependence. |
| Databáze: | OpenAIRE |
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