TY  - JOUR
A1  - Pietrzak, Tomasz
A1  - Botvina, Alexander
A1  - Brzychczyk, Janusz
A1  - Buyukcizmeci, Nihal
A1  - Le Fèvre, Arnaud
A1  - Łukasik, Jarosław
A1  - Pawłowski, Piotr
A1  - Sfienti, Concettina
A1  - Trautmann, Wolfgang
A1  - Wieloch, Andrzej
T1  - The percolation phase transition and statistical multifragmentation in finite systems
T2  - Physics letters B
N2  - The cumulant ratios up to fourth order of the Z distributions of the largest fragment in spectator fragmentation following 107,124Sn+Sn and 124La+Sn collisions at 600 MeV/nucleon have been investigated. They are found to exhibit the signatures of a second-order phase transition established with cubic bond percolation and previously observed in the ALADIN experimental data for fragmentation of 197Au projectiles at similar energies. The deduced pseudocritical points are found to be only weakly dependent on the A/Z ratio of the fragmenting spectator source. The same holds for the corresponding chemical freeze-out temperatures of close to 6 MeV.The experimental cumulant distributions are quantitatively reproduced with the Statistical Multifragmentation Model and parameters used to describe the experimental fragment multiplicities, isotope distributions and their correlations with impact-parameter related observables in these reactions. The characteristic coincidence of the zero transition of the skewness with the minimum of the kurtosis excess appears to be a generic property of statistical models and is found to coincide with the maximum of the heat capacity in the canonical thermodynamic fragmentation model.
KW  - Heavy ion collisions
KW  - Percolation theory
KW  - Statistical multifragmentation models
Y1  - 2020
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69849
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-698490
SN  - 0370-2693
VL  - 809
IS  - 135763
PB  - Elsevier
CY  - Amsterdam
ER  -