FORMATION OF HELIUM-CLUSTER IONSCO2Hen+(n≤15)IN A DRIFT TUBE COOLED BY LIQUID HELIUM

H. Tanuma, M. Sakamoto and N. Kobayashi
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H. Tanuma: Department of Physics, Tokyo Metropolitan University, 1–1 Minami-Ohsawa, Hachioji, Tokyo 192–03, Japan
M. Sakamoto: Department of Physics, Tokyo Metropolitan University, 1–1 Minami-Ohsawa, Hachioji, Tokyo 192–03, Japan
N. Kobayashi: Department of Physics, Tokyo Metropolitan University, 1–1 Minami-Ohsawa, Hachioji, Tokyo 192–03, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 205-209

Abstract: The formation of helium-cluster ionCO2Hen+(n≤15)has been observed whenCO2+ions are injected into a drift tube filled with helium gas cooled by liquid helium. The cluster sizesn = 5and 14 are found to be magic numbers based on the drift-field dependence of the cluster size distribution. The structure ofCO2He14+cannot be considered as the icosahedron, which is proposed as the structure of the cluster ions having twelve helium atoms surrounding the ionic core in our previous papers.

Date: 1996
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DOI: 10.1142/S0218625X96000413

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