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Kada, Wataru; Yokoyama, Akihito; Koka, Masashi; Sato, Takahiro; Kamiya, Tomihiro
International Journal of PIXE, 22(1&2), p.21 - 27, 2012/09
Local distribution of the elements with specific chemical-states or structures may decide the behaviours of the host materials, but is hardly obtainable by conventional micro-PIXE analysis. On the other hand, Ion Beam-Induced luminescence (IBIL) analysis is able to estimate chemical-state or structural information of the targets distributed in the interaction area of the ion-beam. This will be an ideal analysis probe to obtain chemical-state imaging of the minerals with micro-meter-size structures. In this study, we analyzed several mineral-complex powders of Si, Al, Fe, Mg, and Mn oxides to characterize luminescent properties of them on the developed 3-MeV-H
micro-PIXE/IBIL system. This is a preliminary study to build a database storing those results for the precise analysis of unknown mineral targets. Then, we have tried to analyze actual mineral sample, asbestos.
Sato, Takahiro; Koka, Masashi; Kozai, Naofumi; Shimizu, Yasuo*; Dobashi, Kunio*; Kada, Wataru; Yokoyama, Akihito; Okubo, Takeru; Yamazaki, Akiyoshi; Ishii, Yasuyuki; et al.
no journal, ,
In the ML-EM for PIXE-CT, energy loss of incident particles and absorption of X-rays affect must be estimated using STIM-CT. This paper shows the appropriateness and the expected spatial resolution of this method are evaluated by a computer simulation and some practical experiments using 3 MeV proton microbeam with a diameter of 1
m at TIARA. The PIXE-CT experiments were carried out using a dried unicellulate and human lung tissue as a test sample placed on an automatic rotation stage, which made a full turn by rotating 360
at each step of 18 in vacuum. In the simulation, X-ray yield and absorption were calculated using density distribution of two-dimensional Shepp phantom. The results of those simulation and experiments have proved that this method is effective in PIXE-CT.
