| 低能原子簇轰击金属薄膜引起的级联碰撞(Ⅰ)——高能反冲原子 |
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| 引用本文： | 潘正瑛. 低能原子簇轰击金属薄膜引起的级联碰撞(Ⅰ)——高能反冲原子[J]. 物理学报, 1993, 42(11): 1887-1894 |
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| 作者姓名： | 潘正瑛 |
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| 作者单位： | 复旦大学物理二系,上海200433 |
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| 基金项目： | 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 |
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| 摘 要： | 用分子动力学模拟研究能量为1keV/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。关键词：
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| 关 键 词： | 原子簇 金属 薄膜 级联碰撞 |
| 收稿时间： | 1993-02-11 |
COLLISION CASCADES INDUCED BY LOW ENERGY CLUSTERS IMPACTING ON METALLIC THIN FILMS ( I )——HIGH ENERGY RECOIL ATOMS |
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| PAN ZHENG-YING. COLLISION CASCADES INDUCED BY LOW ENERGY CLUSTERS IMPACTING ON METALLIC THIN FILMS ( I )——HIGH ENERGY RECOIL ATOMS[J]. Acta Physica Sinica, 1993, 42(11): 1887-1894 |
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| Authors: | PAN ZHENG-YING |
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| Abstract: | 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.
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