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Chiba, Atsuya; Saito, Yuichi; Narumi, Kazumasa
JAEA-Review 2005-001, TIARA Annual Report 2004, p.343 - 345, 2006/01
Recently, we have gained interesting results on the interaction between a swift cluster ion and a solid in TIARA. For the elucidation of these interactions and the physical effects, it is very important to grasp the structure of the cluster. For this purpose, a measurement system based on Coulomb explosion imaging (ECI) for analyzing the structure of small carbon clusters has been developed. The ECI technique involves the foil-induced dissociation of a swift cluster by electron stripping. As our first step of the investigation on the carbon cluster structure, the preliminary experiment was carried out on the structure dependence on the average charge state of atoms that composed a cluster passing through a thin foil.The result shows the same tendency as a calculated theoretical value.
Chiba, Atsuya; Saito, Yuichi; Tajima, Satoshi
Nuclear Instruments and Methods in Physics Research B, 232(1-4), p.32 - 36, 2005/05
Times Cited Count：11 Percentile：60.21(Instruments & Instrumentation)The structure of cluster ion may be important parameter for resolution of physical effect and interaction with cluster ion and solid. In this paper, we report a Coulomb explosion imaging of the constituent atoms of a swift carbon cluster (Cn, n=2, 3 and 6) passing through a thin foil and their average charge state that related with the structure of the cluster. The experimental setup is based on the 3MV TANDEM accelerator at the JAERI Takasaki. The cluster ion beam is pulsed by electrical deflection plates and an aperture. A few clusters pass trough the thin foil during 1 second, and the resulting are collected by the luminance plate detector. The average charge state was shown an almost same tendency as calculate theoretical value.
-scaling of lattice parameter change in high ion-velocity region (
2.6
10
cm/s) in ion-irradiated EuBa
Cu
O
Ishikawa, Norito; Iwase, Akihiro; Chimi, Yasuhiro; Michikami, Osamu*; Wakana, Hironori*; Hashimoto, Takeo*; Kambara, Tadashi*; M
ller, C.*; Neumann, R.*
Nuclear Instruments and Methods in Physics Research B, 193(1-4), p.278 - 282, 2002/06
Times Cited Count：8 Percentile：46.24(Instruments & Instrumentation)Swift heavy ions with wide energy range of 80MeV-3.84GeV have been irradiated to EuBaCuO oxide superconductors, and the lattice parameter change due to elecronic excitation has been measured. In the high ion-velocity region, the change in lattice parameter per unit fluence varies as the 4th power of the electronic stopping power. However, in the low-velocity region, the deviation from the 4th power dependence is observed. The results are analyzed by using the primary ionization rate, and it is found that the results support that the Coulomb explosion triggers the atomic displacements.
