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TIAN WenDong MA YuGang CAI XiangZhou FANG DeQing WANG HongWei & WU HongLi 《中国科学:物理学 力学 天文学(英文版)》2011,(Z1)
This paper summarizes the isoscaling and isospin related studies in asymmetry nuclear reactions by different dynamic and sta tistical models. Isospin dependent quantum molecular dynamics model (IQMD) and lattice gas model (LGM) are used to study the isoscaling properties and isoscaling parameters dependence on incident energies, impact parameters, temperature and other parameters. In the LGM model, the signal of phase transition has been found in free neutron (proton) chemical potential dif ference Δμn or Δ... 相似文献
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In this paper, the isotopic and isotonic distributions of projectile fragmentation products have been simulated by a modified statistical abrasion--ablation model and the isoscaling behaviour of projectile-like fragments has been discussed. The isoscaling parameters α and β have been extracted respectively, for hot fragments before evaporation and cold fragments after evaporation. It looks that the evaporation has stronger effect on α than β. For cold fragments, a monotonic increase of α and β with the increase of Z and N is observed. The relation between isoscaling parameter and the change of isospin content is discussed. 相似文献
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Yong-Jing Chen Yang-Yang Liu Li-Le Liu Fang-Yuan Wang Ying-Xun Zhang 《中国物理C(英文版)》2021,45(8):084101-084101-7
The isoscaling parameters α_(eval) in the fissioning systems,i.e.,those extracted from the Evaluated Nuclear Data Library(ENDFIB-VIII.0) and the Joint Evaluated Fission and Fusion File(JEFF-3.3),show an obvious difference from simple statistic model prediction where only the symmetry energy plays the dominant role.To explain the α_(eval) as a function of the charge number of the fission fragment,a statistic scission point model is adopted.Our analysis shows that the effects of the shell correction,nuclear shape deformation,and intrinsic temperature of fission fragments are indispensable as well as the symmetry energy.Furthermore,an alternative method for extracting the intrinsic temperatures of fission fragments is proposed based on the iso scaling relationship in fission fragments.The intrinsic temperatures of the light fragments are higher than those of the heavy fragments. 相似文献
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