Projectile fragmentation of 388 A MeV 20Ne in polyethylene, carbon and aluminum targets

Abstract

The total charge-changing cross sections and the partial cross sections for the production of projectile fragment are measured in the interactions of 388A MeV 20Ne with aluminum, carbon and polyethylene targets sandwiched with CR-39 plastic nuclear track detectors. The measured total charge-changing cross sections are compared with the prediction using Bradt–Peters semi-empirical formula, and NUCFRG2 and PHITS models. It is shown that the measured experimental results are in good agreement with theoretical model predictions. The partial cross sections for projectile fragment production are consistent with other experimental results at same and nearly the same energies except for fragment with charge Z=5. The partial cross sections of fragment with charge Z=5 from C and Al targets are smaller than other experimental results, and the result from H target is greater than that of other experiments, which can be explained by the limitation of detection efficiency of CR-39. Finally, it is clearly seen that the partial cross sections for projectile fragment production show obvious odd–even effects.