Isoscaling Behaviour in the Isospin-Dependent Quantum Molecular Dynamics Model
TIAN Wen-Dong1, MA Yu-Gang1, CAI Xiang-Zhou1, CHEN Jin-Gen1, CHEN Jin-Hui, FANG De-Qing1, GUO Wei1, MA Chun-Wang1, MA Guo-Liang1,2, SHEN Wen-Qing1, WANG Kun1,2, WEI Yi-Bin1,2, YAN Ting-Zhi1, ZHONG Chen1,ZUO Jia-Xu1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 201800
2Graduate School of the Chinese Academy of Sciences, Beijing 100039
Isoscaling Behaviour in the Isospin-Dependent Quantum Molecular Dynamics Model
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 201800
2Graduate School of the Chinese Academy of Sciences, Beijing 100039
Abstract： The isoscaling behaviour is investigated in a frame of isospin-dependent quantum molecular dynamics models. The isotopic yields ratio Y2/Y1 for reactions 48Ca+48Ca and 40Ca+40Ca at different entrance channels are simulated and presented, the relationship between the isoscaling parameter and the entrance channel is analysed, the results show that α and β reduce with the rise of incident energies and increase with the impact parameter b, which can be attributed to the temperature varying of the pre-fragments in different entrance channels. The relation of α and symmetry-term coefficient Csym reveals that the chemical potential difference Δμ is sensitive to the symmetry-term coefficient Csym, and raises with the increasing Csym.
2005, Vol. 22 
