Bi-Directional Ion Emission from Massive Gold Cluster Impacts on Nanometric Carbon Foils.
Bi-Directional Ion Emission from Massive Gold Cluster Impacts on Nanometric Carbon Foils.
复制标题
大量金簇的双向离子发射对纳米碳箔的影响。
DOI：
10.1021/jp212126m
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Schweikert,EmileA
中科院分区：
文献类型：
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作者：
Debord,JDaniel;Della-Negra,Serge;Fernandez-Lima,FranciscoA;Verkhoturov,StanislavV;Schweikert,EmileA
由单个Aun+ q团簇射弹（95-125 qkeV，n/q= 3-200）撞击的薄碳箔（5-40 nm）的碳团簇发射揭示了作为射弹特性的函数的关于物质中的能量沉积、射弹射程和射弹命运的特征。第一次，从薄箔的二次离子发射已被同时监测在向前和向后的发射方向。弹丸射程和发射深度作为弹丸大小，能量和目标厚度的函数进行了检查。一个关键的发现是，大规模的集群影响的发展非常不同，从一个小的多原子弹丸。125 qkeV Au 100 q +q（q <$4）射弹的射程估计为20 nm（远远超出等速Au+的射程），即使在5 nm厚的箔的出口处也会发生射弹衰变。
Carbon cluster emission from thin carbon foils (5–40 nm) impacted by individual Aun+qcluster projectiles (95–125 qkeV,n/q= 3–200) reveals features regarding the energy deposition, projectile range, and projectile fate in the matter as a function of the projectile characteristics. For the first time, the secondary ion emission from thin foils has been monitored simultaneously in both forward and backward emission directions. The projectile range and depth of emission were examined as a function of projectile size, energy, and target thickness. A key finding is that the massive cluster impact develops very differently from that of a small polyatomic projectile. The range of the 125 qkeV Au100q+q(q≈ 4) projectile is estimated to be 20 nm (well beyond the range of an equal velocity Au+), and projectile disintegration occurs at the exit of even a 5 nm thick foil.