Abstract
The emission of intermediate-mass fragments in collisions of {sup 197}Au on {sup 197}Au was systematically studied over the range of incident energies from 40 to 150 A MeV using the 4{pi}-multidetector INDRA and beams from the heavy-ion synchrotron SIS at GSI Darmstadt. The analysis was performed as a function of incident energy and of impact parameter, defined through the total transverse energy of light charged particles (Etrans 12, Z{<=}2). This observable was found to scale linearly with the collision energy up to a certain limit above which it saturates. Strong forward-backward asymmetries in the emission pattern with respect to the rapidities of the projectile and target residua were observed. Their possible relation to equilibration is discussed and interpreted in the framework of molecular dynamics and statistical multifragmentation models. Transverse velocities at midrapidity for peripheral collisions were found to show a surprisingly weak dependence on the incident energy. On the contrary, transverse velocities at midrapidity for central collisions showed a strong dependence on incident energy indicating an increasing importance of collective flow with increasing bombarding energy.
Lukasik, J;
[1]
H. Niewodniczanski Institute of Nuclear Physics, Pl-31342 Krakow (Poland)];
Auger, G;
Bouriquet, B;
Chbihi, A;
Frankland, J D;
Hudan, S;
Laville, J L;
Tabacaru, G;
[2]
Bacri, Ch O;
Borderie, B;
Lavaud, F;
Plagnol, E;
[3]
Begemann-Blaich, M L;
Bittiger, R;
Gourio, D;
Orth, H;
LeFevre, A;
Lynen, U;
Mueller, W F.J.;
Sfienti, C
[4]
- Gesellschaft fuer Schwerionenforschung mbH, D-64291 Darmstadt (Germany)
- GANIL, CEA et IN2P3-CNRS, B.P. 5027, F-14076 Caen (France)
- Institut de Physique Nucleaire, IN2P3-CNRS et Universite, F-91406 Orsay (France)
- Gesellschaft fuer Schwerionenforschung mbH, D-64291 Darmstadt (Germany); and others
Citation Formats
Lukasik, J, H. Niewodniczanski Institute of Nuclear Physics, Pl-31342 Krakow (Poland)], Auger, G, Bouriquet, B, Chbihi, A, Frankland, J D, Hudan, S, Laville, J L, Tabacaru, G, Bacri, Ch O, Borderie, B, Lavaud, F, Plagnol, E, Begemann-Blaich, M L, Bittiger, R, Gourio, D, Orth, H, LeFevre, A, Lynen, U, Mueller, W F.J., and Sfienti, C.
Transverse velocity scaling in Au+Au midrapidity emissions.
United States: N. p.,
2002.
Web.
doi:10.1063/1.1470021.
Lukasik, J, H. Niewodniczanski Institute of Nuclear Physics, Pl-31342 Krakow (Poland)], Auger, G, Bouriquet, B, Chbihi, A, Frankland, J D, Hudan, S, Laville, J L, Tabacaru, G, Bacri, Ch O, Borderie, B, Lavaud, F, Plagnol, E, Begemann-Blaich, M L, Bittiger, R, Gourio, D, Orth, H, LeFevre, A, Lynen, U, Mueller, W F.J., & Sfienti, C.
Transverse velocity scaling in Au+Au midrapidity emissions.
United States.
https://doi.org/10.1063/1.1470021
Lukasik, J, H. Niewodniczanski Institute of Nuclear Physics, Pl-31342 Krakow (Poland)], Auger, G, Bouriquet, B, Chbihi, A, Frankland, J D, Hudan, S, Laville, J L, Tabacaru, G, Bacri, Ch O, Borderie, B, Lavaud, F, Plagnol, E, Begemann-Blaich, M L, Bittiger, R, Gourio, D, Orth, H, LeFevre, A, Lynen, U, Mueller, W F.J., and Sfienti, C.
2002.
"Transverse velocity scaling in Au+Au midrapidity emissions."
United States.
https://doi.org/10.1063/1.1470021.
@misc{etde_20618939,
title = {Transverse velocity scaling in Au+Au midrapidity emissions}
author = {Lukasik, J, H. Niewodniczanski Institute of Nuclear Physics, Pl-31342 Krakow (Poland)], Auger, G, Bouriquet, B, Chbihi, A, Frankland, J D, Hudan, S, Laville, J L, Tabacaru, G, Bacri, Ch O, Borderie, B, Lavaud, F, Plagnol, E, Begemann-Blaich, M L, Bittiger, R, Gourio, D, Orth, H, LeFevre, A, Lynen, U, Mueller, W F.J., and Sfienti, C}
abstractNote = {The emission of intermediate-mass fragments in collisions of {sup 197}Au on {sup 197}Au was systematically studied over the range of incident energies from 40 to 150 A MeV using the 4{pi}-multidetector INDRA and beams from the heavy-ion synchrotron SIS at GSI Darmstadt. The analysis was performed as a function of incident energy and of impact parameter, defined through the total transverse energy of light charged particles (Etrans 12, Z{<=}2). This observable was found to scale linearly with the collision energy up to a certain limit above which it saturates. Strong forward-backward asymmetries in the emission pattern with respect to the rapidities of the projectile and target residua were observed. Their possible relation to equilibration is discussed and interpreted in the framework of molecular dynamics and statistical multifragmentation models. Transverse velocities at midrapidity for peripheral collisions were found to show a surprisingly weak dependence on the incident energy. On the contrary, transverse velocities at midrapidity for central collisions showed a strong dependence on incident energy indicating an increasing importance of collective flow with increasing bombarding energy.}
doi = {10.1063/1.1470021}
journal = []
issue = {1}
volume = {610}
journal type = {AC}
place = {United States}
year = {2002}
month = {Apr}
}
title = {Transverse velocity scaling in Au+Au midrapidity emissions}
author = {Lukasik, J, H. Niewodniczanski Institute of Nuclear Physics, Pl-31342 Krakow (Poland)], Auger, G, Bouriquet, B, Chbihi, A, Frankland, J D, Hudan, S, Laville, J L, Tabacaru, G, Bacri, Ch O, Borderie, B, Lavaud, F, Plagnol, E, Begemann-Blaich, M L, Bittiger, R, Gourio, D, Orth, H, LeFevre, A, Lynen, U, Mueller, W F.J., and Sfienti, C}
abstractNote = {The emission of intermediate-mass fragments in collisions of {sup 197}Au on {sup 197}Au was systematically studied over the range of incident energies from 40 to 150 A MeV using the 4{pi}-multidetector INDRA and beams from the heavy-ion synchrotron SIS at GSI Darmstadt. The analysis was performed as a function of incident energy and of impact parameter, defined through the total transverse energy of light charged particles (Etrans 12, Z{<=}2). This observable was found to scale linearly with the collision energy up to a certain limit above which it saturates. Strong forward-backward asymmetries in the emission pattern with respect to the rapidities of the projectile and target residua were observed. Their possible relation to equilibration is discussed and interpreted in the framework of molecular dynamics and statistical multifragmentation models. Transverse velocities at midrapidity for peripheral collisions were found to show a surprisingly weak dependence on the incident energy. On the contrary, transverse velocities at midrapidity for central collisions showed a strong dependence on incident energy indicating an increasing importance of collective flow with increasing bombarding energy.}
doi = {10.1063/1.1470021}
journal = []
issue = {1}
volume = {610}
journal type = {AC}
place = {United States}
year = {2002}
month = {Apr}
}