Development of a real-time beam current monitoring system for microbeam scanning-PIXE analysis using a ceramic channel electron multiplier

Ishikawa, Takahiro; Iso, Hiroyuki; Oikawa, Masakazu; Konishi, Teruaki; Kitamura, Hisashi; Higuchi, Yuichi; Suya, Noriyoshi; Hamano, Tsuyoshi; Imaseki, Hitoshi

doi:10.1016/j.nimb.2009.03.011

Cited by 11 publications

(3 citation statements)

References 12 publications

(10 reference statements)

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“…Because the energy loss and irradiation effect of hundred-keV ions on the surface are considerably stronger than those of keV and MeV ions, microsized or nanosized ion beams with hundred-keV energies have broad applications, ranging from microsurgery in living cells 20 21 22 to the controlled nanopatterning 23 24 25 of material surfaces, e.g., forming regular nanopore arrays on graphene 26 27 .…”

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confidence: 99%

Transmission of Hundred-keV Protons through Insulating Nanocapillaries: Charge-patch-assisted Specular Reflections

Wang

Shao

Song

et al. 2015

Sci Rep

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In this work, we measured the time evolution of the transmission features of 10–100 keV protons transmitted through nanocapillaries in a polycarbonate (PC) membrane. After reaching equilibrium, transmitted particles with an incident energy of 100 keV were located around the direction along the incident beam but not along the capillary axis, indicating that the transport mechanism of the 100 keV ion was distinct from that of keV-energy ions. The simulation results indicated that charge-patch-assisted collective scatterings on the surface are the main transport mechanism for the hundred-keV ions in nanocapillaries. This scenario fills in the gap in the previous understanding of ion transmission in nanocapillaries from keV to MeV energies.

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confidence: 99%

Transmission of Hundred-keV Protons through Insulating Nanocapillaries: Charge-patch-assisted Specular Reflections

Wang

Shao

Song

et al. 2015

Sci Rep

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“…The distribution of phosphorus, potassium, and calcium was determined using μ-PIXE analysis using a Model OM-2000 microbeam scanning PIXE system (Oxford Microbeams Ltd., Oxford, UK) with a Si (Li) detector [22]. Elemental images were constructed using the intensity data of the P Kα, and K Kα lines at each point were obtained by scanning the specimens under the following conditions: proton energy, 3.0 MeV; integrated current, 0.2 μC; spatial resolution, 1 μm × 1 μm.…”

Section: Methodsmentioning

confidence: 99%

Phosphorus Localization and Its Involvement in the Formation of Concentrated Uranium in the Renal Proximal Tubules of Rats Exposed to Uranyl Acetate

Homma-Takeda

Numako

Kitahara

et al. 2019

IJMS

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Although the kidneys comprise a critical target of uranium exposure, the dynamics of renal uranium distribution have remained obscure. Uranium is considered to function physiologically in the form of uranyl ions that have high affinity for phosphate groups. The present study applied microbeam-based elemental analysis to precisely determine the distribution of phosphorus and uranium in the kidneys of male Wistar rats exposed to uranium. One day after a single subcutaneous injection of uranyl acetate (2 mg/kg), areas of concentrated phosphorus were scattered in the S3 segments of the proximal tubule of the kidneys, whereas the S3 segments in control rats and in rats given a lower dose of uranium (0.5 mg/kg) contained phosphorus without concentrated phosphorus. Areas with concentrated phosphorus contained uranium 4- to 14-fold more than the mean uranium concentration (126–472 vs. 33.1 ± 4.6 μg/g). The chemical form of uranium in the concentrated phosphorus examined by XAFS was uranium (VI), suggesting that the interaction of uranyl ions with the phosphate groups of biomolecules could be involved in the formation of uranium concentration in the proximal tubules of kidneys in rats exposed to uranium.

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“…Scale cross sections and thin-section standards were analyzed using a micro-beam scanning PIXE system (Model OM2000, Oxford Micro Beams, Ltd., Oxford, UK) with a Si (Li) (Sirius80, Gresham) 14 and a CdTe X-ray detector (XR-100T-CdTe, Amptek). 13 During the rearing experiment, six ridges were formed on the scale of the fish (Fig.…”

Section: Micro-pixe Analysismentioning

confidence: 99%

LOCAL ANALYSIS OF STRONTIUM USING FISH SCALE BY MICRO-PIXE WITH A CdTe X-RAY DETECTOR

Suzuki

Homma-Takeda²,

Oikawa³

et al. 2012

Int. J. PIXE

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Sr is an indicator used in studies on fish migration. In this study, the Sr profiles of ridges, which are growth lines in fish scales, in Sakhalin taimen (Hucho perryi) were examined by micro-PIXE analysis. Sakhalin taimen were reared under freshwater conditions for six months. The ridges that formed during the rearing experiment were subjected to PIXE spot analysis. This analysis was performed in a 5 × 5 µm 2 area in the center region of each ridge of the scale section, and the Sr levels were calculated using the thin-section standard. The mean Sr concentration in the ridges was 428 ± 48 µg/g. The quantitative PIXE spot analysis successfully provided Sr profiles for the scale corresponding to ridge formation.

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Development of a real-time beam current monitoring system for microbeam scanning-PIXE analysis using a ceramic channel electron multiplier

Cited by 11 publications

References 12 publications

Transmission of Hundred-keV Protons through Insulating Nanocapillaries: Charge-patch-assisted Specular Reflections

Transmission of Hundred-keV Protons through Insulating Nanocapillaries: Charge-patch-assisted Specular Reflections

Phosphorus Localization and Its Involvement in the Formation of Concentrated Uranium in the Renal Proximal Tubules of Rats Exposed to Uranyl Acetate

LOCAL ANALYSIS OF STRONTIUM USING FISH SCALE BY MICRO-PIXE WITH A CdTe X-RAY DETECTOR

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