摘要
Extensive calculations on isoscaling behavior with the sequential-decay model GEMINI are performed for the mediate-heavy nuclei in the mass range A=110 and at excitation energies of up to 3 MeV per nucleon.Isoscaling can still be observed after entire−step decays are considered for the light products as in the only first-step decay process case.Comparison between the products after the first-step decay and the ones after entire-step decay demonstrates that multi-step secondary sequential decay strongly influences the isoscaling parametersα,βas well as the fragment isospin distribution.After entire−step decays,the isoscaling parametersαandβare decreased and the fragment isospin distribution can better reproduce the isospin distribution shape as the experimental data.
基金
by the National Natural Science Foundation of China under Grant Nos 10875160,1097907 and 11035009
the National Basic Research Program of China under Grant No 2007CB815004
the Knowledge Innovation Project of Chinese Academy of Sciences under Grants No KJCX2-EW-N01
the Shanghai Development Foundation for Science and Technology under Grant No 09JC1416800.
