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Velocity correlated emission of Aln+ clusters by keV C60- - surface impact
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms ( IF 1.3 ) Pub Date : 2020-09-09 , DOI: 10.1016/j.nimb.2020.06.042
A. Bekkerman , B. Tsipinyuk , E. Kolodney

This study is aimed at testing the validity of the “velocity correlated cluster emission” effect using a large polyatomic projectile [as reported earlier in: E. Armon et al, PRL 113, 027604(2014) and JCP 150, 204705 (2019)] also for light metallic targets. We have bombarded an aluminium target by 14 keV C60- ions resulting in the emission of pure Aln+ (n = 1–16) and mixed AlnCm+ cluster ions. Kinetic energy distributions (KEDs) were measured for the emitted Aln+ (n = 1–14) ions. It was found that similarly to that observed for the heavy metallic targets, the KEDs of the large Aln+ (n ≥ 7) clusters can be described with a shifted Maxwellian using a single pair of fitting parameters (temperature and center-of-mass velocity) but with a weaker increase of most probable energies with cluster size. An explanation in terms of mass effect is proposed.



中文翻译:

keV对Al n +团簇的速度相关发射C60-- -表面冲击

这项研究旨在使用大型多原子弹丸测试“速度相关簇发射”效应的有效性[如先前报道:E。Armon等人,PRL 113,0276​​04(2014)和JCP 150,204705(2019)]也适用于轻金属目标。我们用14 keV轰炸了一个铝靶C60-- 离子导致纯净的发射 ñ+n  = 1–16)并混合ñC+簇离子。测量排放的动能分布(KED)ñ+n  = 1-14)个离子。发现与大型金属靶观察到的相似,大型ñ+Ñ  ≥7)簇可以用来描述使用单一一对装配参数(温度和中心的质量速度)的移位麦克斯韦但最可能的能量与群集大小较弱的增加。提出了关于质量效应的解释。

更新日期:2020-09-10
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