Pseudo-critical clusterization in nuclear multi-fragmentation

10th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Gruyer, D.^1 ; Frankland, J.D.^1 ; Botet, R.^2 ; Pløoszajczak, M.^1 ; Bonnet, E.^1 ; Chbihi, A.^1 ; Marini, P.^1

GANIL, CEA-DSM/CNRS-IN2P3, Bvd. Henri Becquerel, F-14076 Caen Cedex, France^1

Laboratoire de Physique du Solide, Universit de Paris-Sud, F-91405 Orsay, France^2

关键词: Asymptotic distributions;    Bombarding energies;    Function of time;    Irreversible aggregation;    Multifragmentation;    Pseudo-critical;    Radial expansions;    Relative weights;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/436/1/012079/pdf
DOI  :  10.1088/1742-6596/436/1/012079

来源: IOP

【 摘 要 】

We show that the biggest fragment charge distribution in central collisions of129Xe+natSn leading to multifragmentation is an admixture of two asymptotic distributions observed for the lowest and highest bombarding energies. The evolution of the relative weights of the two components with bombarding energy is shown to be analogous to that observed as a function of time for the largest cluster produced in irreversible aggregation for a finite system. We infer that the size distribution of the largest fragment in nuclear multifragmentation is also characteristic of the time scale of the process, which is largely determined by the onset of radial expansion in this energy range.