Abstract
The entropy per nucleon (S/A) has been extracted for the Au (150-800 A MeV)+Au reaction by using the Phase I set-up of the 4{pi}-Facility (FOPI) at GSI, Darmstadt. The entropy has been obtained from the comparison of various observables characterizing the dM/dZ fragment multiplicity distributions, extending up to Z {approx} 15, with those calculated with the Quantum Statistical Model. It is the first time that S/A values are determined by considering the full ensemble of charged products detected in the reaction. Consistent values of S/A are found from different methods. These entropy values are shown to be fairly independent of the volume of the `participant` region considered. They are somewhat lower than those extracted in earlier works but are in good agreement with hydrodynamic calculations and suggest a low viscosity for the hot and dense nuclear matter. (author) 67 refs., 12 figs., 1 tab.
Kuhn, C;
[1]
Buta, A;
[2]
Kecskemeti, J;
[3]
Alard, J P;
[4]
Fan, Z G;
[5]
Konopka, J;
[6]
Belaev, I M;
[7]
Blaich, T;
[8]
Dona, R;
[9]
Herrmann, N
[10]
- Strasbourg-1 Univ., 67 (France). Centre de Recherches Nucleaires
- Central Inst. of Physics, Bucharest (Romania). Inst. of Physics and Nuclear Engineering
- Hungarian Academy of Sciences, Budapest (Hungary). Central Research Inst. for Physics
- Clermont-Ferrand-2 Univ., 63 - Aubiere (France). Lab. de Physique Corpusculaire
- Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)
- Frankfurt Univ. (Germany). Inst. fuer Theoretische Physik
- AN SSSR, Moscow (Russian Federation). Inst. Ehksperimental`noj i Teoreticheskoj Fiziki
- Mainz Univ. (Germany)
- Istituto Nazionale di Fisica Nucleare, Legnaro (Italy)
- Heidelberg Univ. (Germany). Physikalisches Inst.; and others
Citation Formats
Kuhn, C, Buta, A, Kecskemeti, J, Alard, J P, Fan, Z G, Konopka, J, Belaev, I M, Blaich, T, Dona, R, and Herrmann, N.
Entropy production in the Au+Au reaction between 150 and 800 A MeV.
France: N. p.,
1993.
Web.
Kuhn, C, Buta, A, Kecskemeti, J, Alard, J P, Fan, Z G, Konopka, J, Belaev, I M, Blaich, T, Dona, R, & Herrmann, N.
Entropy production in the Au+Au reaction between 150 and 800 A MeV.
France.
Kuhn, C, Buta, A, Kecskemeti, J, Alard, J P, Fan, Z G, Konopka, J, Belaev, I M, Blaich, T, Dona, R, and Herrmann, N.
1993.
"Entropy production in the Au+Au reaction between 150 and 800 A MeV."
France.
@misc{etde_10138970,
title = {Entropy production in the Au+Au reaction between 150 and 800 A MeV}
author = {Kuhn, C, Buta, A, Kecskemeti, J, Alard, J P, Fan, Z G, Konopka, J, Belaev, I M, Blaich, T, Dona, R, and Herrmann, N}
abstractNote = {The entropy per nucleon (S/A) has been extracted for the Au (150-800 A MeV)+Au reaction by using the Phase I set-up of the 4{pi}-Facility (FOPI) at GSI, Darmstadt. The entropy has been obtained from the comparison of various observables characterizing the dM/dZ fragment multiplicity distributions, extending up to Z {approx} 15, with those calculated with the Quantum Statistical Model. It is the first time that S/A values are determined by considering the full ensemble of charged products detected in the reaction. Consistent values of S/A are found from different methods. These entropy values are shown to be fairly independent of the volume of the `participant` region considered. They are somewhat lower than those extracted in earlier works but are in good agreement with hydrodynamic calculations and suggest a low viscosity for the hot and dense nuclear matter. (author) 67 refs., 12 figs., 1 tab.}
place = {France}
year = {1993}
month = {Dec}
}
title = {Entropy production in the Au+Au reaction between 150 and 800 A MeV}
author = {Kuhn, C, Buta, A, Kecskemeti, J, Alard, J P, Fan, Z G, Konopka, J, Belaev, I M, Blaich, T, Dona, R, and Herrmann, N}
abstractNote = {The entropy per nucleon (S/A) has been extracted for the Au (150-800 A MeV)+Au reaction by using the Phase I set-up of the 4{pi}-Facility (FOPI) at GSI, Darmstadt. The entropy has been obtained from the comparison of various observables characterizing the dM/dZ fragment multiplicity distributions, extending up to Z {approx} 15, with those calculated with the Quantum Statistical Model. It is the first time that S/A values are determined by considering the full ensemble of charged products detected in the reaction. Consistent values of S/A are found from different methods. These entropy values are shown to be fairly independent of the volume of the `participant` region considered. They are somewhat lower than those extracted in earlier works but are in good agreement with hydrodynamic calculations and suggest a low viscosity for the hot and dense nuclear matter. (author) 67 refs., 12 figs., 1 tab.}
place = {France}
year = {1993}
month = {Dec}
}