团簇碰撞中双团簇分子(Na_9)_2的形成研究

On cluster dimer (Na_9)_2 formation in cluster-cluster collisions

采用紧密结合分子动力学模型 ,对Na9+Na9碰撞系统在质心系中单原子的轰击能量为Ecm/n =0 .0 0 63eV的对心碰撞进行了研究。从动力学的观点对双团簇分子 (Na9) 2 的形成给予了证明 ,结合所谓“突然冷却”技术 ,鉴别出了所形成的 (Na9) 2 ,并给出了其结构性质。

By using the tight binding milecular dynamics simulations in the head on collisopn, we give some evidences of the structures of (Na 9) 2 cluster dimer from the dynamical point of view. We show that the (Na 9) 2 cluster dimer may exist as intermediate states and decay to compact stucture finally. Based on a technique called sharp cooling' a stable cluster dimer (Na 9) 2 is brought into being to end with T =18 K, whose eigen mode frequencies is obtained with Fourier transform of the velocity auto correlation function.