Impact parameter dependence of linear momentum transfer and the role of two-body dissipation mechanisms in heavy ion collisions around the Fermi energy

1998 ◽  
Vol 442 (1-4) ◽  
pp. 48-52 ◽  
Author(s):  
P. Piattelli ◽  
D. Santonocito ◽  
Y. Blumenfeld ◽  
T. Suomijärvi ◽  
C. Agodi ◽  
...  
Keyword(s):  
Momentum Transfer ◽  
Impact Parameter ◽  
Fermi Energy ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Linear Momentum ◽  
Parameter Dependence ◽  
Ion Collisions

scholarly journals Impact Parameter Dependence ofπ-/π+Ratio in Probing the Nuclear Symmetry Energy Using Heavy-Ion Collisions

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Gao-Feng Wei ◽  
Guo-Qiang He ◽  
Xin-Wei Cao ◽  
Yi-Xin Lu
Keyword(s):  
Impact Parameter ◽  
Symmetry Energy ◽  
Heavy Ion Collisions ◽  
Transport Model ◽  
Heavy Ion ◽  
Parameter Dependence ◽  
Central Collisions ◽  
Ion Collisions ◽  
Peripheral Collisions ◽  
The Impact

The impact parameter dependence ofπ-/π+ratio is examined in heavy-ion collisions at 400 MeV/nucleon within a transport model. It is shown that the sensitivity ofπ-/π+ratio on symmetry energy shows a transition from central to peripheral collisions; that is, the stiffer symmetry energy leads to a largerπ-/π+ratio in peripheral collisions while the softer symmetry energy always leads this ratio to be larger in central collisions. After checking the kinematic energy distribution ofπ-/π+ratio, we found this transition of sensitivity ofπ-/π+ratio to symmetry energy is mainly from less energetic pions; that is, the softer symmetry energy gets the less energetic pions to form a smallerπ-/π+ratio in peripheral collisions while these pions generate a largerπ-/π+ratio in central collisions. Undoubtedly, the softer symmetry energy can also lead more energetic pions to form a largerπ-/π+ratio in peripheral collisions. Nevertheless, considering that most of pions are insufficiently energetic at this beam energy, we therefore suggest theπ-/π+ratio as a probe of the high-density symmetry energy effective only in central at most to midcentral collisions, thereby avoiding the possible information of low-density symmetry energy carried inπ-/π+ratio from peripheral collisions.

scholarly journals Impact-parameter dependence of giant resonance excitations in relativistic heavy-ion collisions

1999 ◽  
Vol 60 (5) ◽  
Author(s):  
A. Grünschloß ◽  
K. Boretzky ◽  
T. Aumann ◽  
C. A. Bertulani ◽  
J. Cub ◽  
...  
Keyword(s):  
Impact Parameter ◽  
Heavy Ion Collisions ◽  
Giant Resonance ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Parameter Dependence ◽  
Ion Collisions

scholarly journals Lights and (some) shadows in the comparison among experimental data of heavy ion collisionat Fermi energies and the dynamical model AMD

2019 ◽  
Vol 223 ◽  
pp. 01050
Author(s):  
Silvia Piantelli ◽  
Alessandro Olmi ◽  
Paolo R. Maurenzig ◽  
Akira Ono ◽  
Maurizio Bini ◽  
...  
Keyword(s):  
Experimental Data ◽  
Impact Parameter ◽  
Fermi Energy ◽  
Energy Region ◽  
Heavy Ion Collisions ◽  
Theoretical Models ◽  
Heavy Ion ◽  
Dynamical Model ◽  
Ion Collisions ◽  
The Impact

The simulation of heavy ion collisions in the Fermi energy region is a challenge for the theoretical models; in particular it is difficult to obtain a coherent description in all the impact parameter range and to reproduce all the experimental observables. In this contribution we will show the very good job done by the dynamical model AMD [1] followed by the statistical code GEMINI [2, 3] as an afterburner. The model is able to reproduce the main characteristics of peripheral and semiperipheral collisions, although some discrepancies still persist.

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