Behavior of the Lyapunov Exponent and Phase Transition in Nuclei
WANG Nan1,2, WU Xi-Zhen1,4, LI Zhu-Xia1,3,4, WANG Ning1,2, ZHUO Yi- Zhong1,3,4, SUN Xiu-Quan2
1China Institute of Atomic Energy, Beijing 102413
2Department of Physics, Northwest University, Xian 710069
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
4Nuclear Theory Center of National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
Behavior of the Lyapunov Exponent and Phase Transition in Nuclei
WANG Nan1,2;WU Xi-Zhen1,4;LI Zhu-Xia1,3,4;WANG Ning1,2;ZHUO Yi- Zhong1,3,4;SUN Xiu-Quan2
1China Institute of Atomic Energy, Beijing 102413
2Department of Physics, Northwest University, Xian 710069
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
4Nuclear Theory Center of National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
Abstract： Based on the quantum molecular dynamics model, we investigate the dynamical behaviors of the excited nuclear system to simulate the latter stage of heavy ion reactions, which associate with a liquid-gas phase transition. We try to search a microscopic way to describe the phase transition in real nuclei. The Lyapunov exponent is employed and examined for our purpose. We find out that the Lyapunov exponent is one of good microscopic quantities to describe the phase transition in hot nuclei. Coulomb potential and the finite size effect may give a strong influence on the critical temperature. However, the collision term plays a minor role in the process of the liquid-gas phase transition in finite systems.
WANG Nan;WU Xi-Zhen;LI Zhu-Xia;;WANG Ning;ZHUO Yi- Zhong;;SUN Xiu-Quan. Behavior of the Lyapunov Exponent and Phase Transition in Nuclei[J]. 中国物理快报, 2000, 17(10): 711-713.
WANG Nan, WU Xi-Zhen, LI Zhu-Xia, , WANG Ning, ZHUO Yi- Zhong, , SUN Xiu-Quan. Behavior of the Lyapunov Exponent and Phase Transition in Nuclei. Chin. Phys. Lett., 2000, 17(10): 711-713.
2000, Vol. 17 
