| Summary: | 碩士 === 國立交通大學 === 物理研究所 === 93 === The main purpose of this thesis is to explore several dynamic properties of liquid Pb, using the molecule dynamic simulation and the instantaneous normal mode analysis. Two potentials of liquid Pb based on different theories are discussed, and the results of their dynamic properties, including radial distribution function, static structure factor, dynamic structure factor, velocity autocorrelation function, density of state and participation ratio, are compared in order to investigate the differences. Attempt is also made to find out the instantaneous resonant modes in liquid Pb in this study. It is concluded that the existence of instantaneous resonant modes can be found in the case that there is a reflection point in the repulsive core of the liquid Pb potential. It is found out that the density of states of instantaneous resonant mode increases with the increase of temperature.
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