期刊
EUROPEAN PHYSICAL JOURNAL D
卷 14, 期 1, 页码 5-8出版社
SPRINGER-VERLAG
DOI: 10.1007/s100530170226
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Single, double and triple ionization cross-sections of C-n(+) clusters in collisions with helium atoms at intermediate velocity (2.6 a.u.) have been measured (n = 1 --> 5). The relative multi-ionization cross-sections (double over single and triple over single) are first increasing with n, then decreasing when going from n = 4 to n = 5. We show, on the basis of an independent atom and electron collisional treatment, that this effect is attributable to a change in the cluster shape. The role of the cluster compactness on relative multi-ionization cross-sections is pointed out here for the first time.
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