摘要
用分子动力学模拟研究能量为1 keV/atom的Au原子簇和0.2keV/atom的Al原子簇轰击金薄膜产生的级联碰撞。分子动力学模拟结果表明,原子簇轰击后,靶原子的反冲能谱加宽。与同样速度的单原子轰击比较,最大反冲能较后者高2—5倍。原子簇轰击后的多次碰撞及运动原子间的碰撞增加了靶原子的反冲能。还用经典力学守恒定律分析了两个碰撞的运动原子间的能量转移。
Collision cascades of 1 keV/atom gold clusters and 0. 2 keV/atom aluminum clusters impacting on gold targets have been investigated by moleculardynamics simulation. The spectra of gold recoil atoms are broader for cluster bombardment. The maximum recoil energies are nearly 2? times higher than the kinematic limit of mono-atomic bombardment. The multiple hits and the collisions between moving atoms make the recoil energies of target atoms increase. The energy transfer between two moving atoms are studied by conservation laws.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第11期1887-1894,共8页
Acta Physica Sinica
基金
国家自然科学基金
中国科学院上海冶金研究所离子束开放研究实验室部分基金
