Projectile atomic-number effect on ion-induced fragmentation and ionization of fullerenes -: art. no. 033201

被引:40
作者
Hadjar, O [1 ]
Hoekstra, R [1 ]
Morgenstern, R [1 ]
Schlathölter, T [1 ]
机构
[1] Univ Groningen, KVI Atom Phys, NL-9747 AA Groningen, Netherlands
来源
PHYSICAL REVIEW A | 2001年 / 63卷 / 03期
关键词
D O I
10.1103/PhysRevA.63.033201
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The delocalized pi electrons of a C-60 cluster can be well described as an electron gas. Electronic friction experienced by a multicharged ion colliding with a fullerene might then be modeled in terms of the electronic stopping power. We investigated such collisions for projectile atomic numbers Z ranging from 2 to 18 and charge states q=2,3. Direct mass-spectrometric evidence of the clear oscillatory behavior of electronic-stopping-related processes such as multifragmentation and ionization of C-60 was observed as a function of Z. From the positions of the maxima of the corresponding cross sections, two classes of trajectories can be distinguished: close collisions through the high electron density of the cage inducing multifragmentation, and glancing collisions through the lower electron densities of the fullerene ''atmosphere'' inducing direct ionization.
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页码:1 / 8
页数:8
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