Isoscaling in dissipative projectile breakup

Source size scaling of fragment production in projectile breakup.

Fragment production has been studied as a function of the source mass and excitation energy in peripheral collisions of 35 Cl+ 197 Au at 43 MeV/nucleon and 70 Ge+ nat Ti at 35 MeV/nucleon. The results are compared to the Au+Au data at 600 MeV/nucleon obtained by the ALADIN collaboration. A mass scaling, by A source ∼ 35 to 190, strongly correlated to excitation energy per nucleon, is presented,...

Influence of the projectile description on breakup calculations

Calculations of the breakup of B and Be are performed with the aim of analyzing their sensitivity to the projectile description. Several potentials adjusted on the same experimental data are used for each projectile. The results vary significantly with the potential choice, and this sensitivity differs from one projectile to the other. In the B case, the breakup cross section is approximately s...

Systematic study of isoscaling behavior in projectile fragmentation by the statistical abrasion-ablation model

The isospin effect and isoscaling behavior in projectile fragmentation have been systematically investigated by a modified statistical abrasion-ablation (SAA) model. The normalized peak differences and reduced isoscaling parameters are found to decrease with (Zproj −Z)/Zproj or the excitation energy per nucleon and have no significant dependence on the size of reaction systems. Assuming a Fermi...

Simulation of Droplet Breakup by Dissipative Particle Dynamics (DPD)

Isoscaling in statistical models

Different statistical multifragmentation models have been used to study isoscaling, i.e., the factorization of the isotope ratios from two reactions, into fugacity terms of proton and neutron number, R21(N ,Z) 5Y 2(N ,Z)/Y 1(N ,Z)5C exp(aN1bZ). Even though the primary isotope distributions are quite different from the final distributions due to evaporation from the excited fragments, the values...