Study of fragmentation at low excitation energies within a dynamical microscopic theory

Mass dependence of the onset of multifragmentation in low energy heavy-ion collisions

“…The Gaussian width L is fixed with a standard value of 1.08 fm 2 . As expected, the average nucleonic density has a mass dependence, being maximal for the 197 Au + 197 Au system and minimal for the 20 Ne + 20 Ne system. This also indicates a linear density dependence on the system size.…”

“…Nearly no effect was seen by varying the binding energy. We have shown in many calculations that this check is close to other momentum cuts [14][15][16][17] or sophisticated algorithms like the simulated annealing clusterization algorithm [18][19][20].…”

“…In other words, the time span of 200 fm/c is large enough to pin down the fragment structure. The maximal fragment production is for the 197 Au + 197 Au system whereas the 20 Ne + 20 Ne system results in a minimum value. It may be mentioned that IMF multiplicities obtained in 20 Ne + 20 Ne and 40 Ar + 45 Sc collisions exclude the largest and second largest fragment respectively to infer the system size dependence accurately.…”

“…(at which the maximal IMF emission occurs). We now include 20 Ne + 20 Ne and 197 Au + 197 Au systems also for the study of system size effects. The average nucleonic density of the system is calculated as…”

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Based on the quantum molecular dynamics (QMD) picture, we calculate the energy and mass dependence of fragment production. For the present study, we simulated the reactions of 20

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