JAERI Takasaki in-air micro-PIXE system for various applications

Sakai, Takuro; Kamiya, Tomihiro; Oikawa, Masakazu; Sato, Takahiro; Tanaka, Akira; Ishii, K.

doi:10.1016/s0168-583x(02)00469-x

Cited by 75 publications

(39 citation statements)

References 8 publications

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“…The hard- ware design of the beam setup in TIARA has been already described in elsewhere (Sakai et al, 2002).…”

Section: Micro-pixe Analysismentioning

confidence: 99%

Preliminary Study on the Elemental Quantification of in Ambient Liquid Samples of Microliter Volume Using the In-air Micro-PIXE Technique

Ma¹,

Lim²,

Sakai³

2017

Asian J. Atmos. Environ

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Quantifying the trace elements in infinitesimal ambient liquid samples (e.g., single raindrop, cloud/ fog water, and the soluble fraction extracted from the particles collected for a short time) is an important task for understanding formation processes, heating/cooling rates, and their health hazards. The purpose of this study is to employ an in-air micro PIXE system for quantitative analysis of the trace elements in a thimbleful of reference liquid sample. The bag type liquid sample holder originally designed with 10 μm thick Mylar ® film retained the original shape without any film perforation and apparent peaks of film blank by the end of the analysis. As one of tasks to be solved, the homogeneity of the elemental distribution in liquid reference species was verified by the X-ray line profiles for several references. It was possible to resolve the significant peaks for whole target elements corresponding to the channel number of micro-PIXE spectrum. The calibration curves for the six target elements (Si, S, Cl, Fe, Ni, and Zn) in standard solutions were successfully plotted by concentration (ppm) and ROI of interest net counts/dose (nC).

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“…The hard- ware design of the beam setup in TIARA has been already described in elsewhere (Sakai et al, 2002).…”

Section: Micro-pixe Analysismentioning

confidence: 99%

Preliminary Study on the Elemental Quantification of in Ambient Liquid Samples of Microliter Volume Using the In-air Micro-PIXE Technique

Ma¹,

Lim²,

Sakai³

2017

Asian J. Atmos. Environ

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“…1(a)). Each sample was attached directly to the window at the end of the microbeam system 38) . The beam spot was approximately 1 µm in diameter and the beam current was approximately 100 pA.…”

Section: Micro Pige/pixe Analysismentioning

confidence: 99%

“…A nuclear reaction (i.e., 19 F (p,αγ) 16 0) was used to measure the F concentration; the generated gamma rays were detected with an 81-cm 2 sodium iodide detector, which was placed 5 mm behind the sample. Ca and Sr concentrations were measured by micro-PIXE, which was simultaneously performed with a silicon lithium detector in vacuum 38) . The beam intensity was monitored according to the X-ray yield from a copper (Cu) foil for quantitative analysis 21) .…”

Section: Micro Pige/pixe Analysismentioning

confidence: 99%

A new technique for analyzing trace element uptake by human enamel

et al. 2015

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Fluorine (F) and strontium (Sr) are key elements in the de-and remineralization of teeth. To quantitatively analyze the distribution of F and Sr, micro-particle-induced gamma/X-ray emission (PIGE/PIXE) technique was used. The cavities were prepared and filled with the fluoride-and Sr-containing restorative materials (FSCMs) in extracted human molars. The single-section enamel specimens were prepared by slicing from the buccal to lingual surface including the FSCMs. After 5 weeks of automatic pH cycling, the demineralization was calculated by integrated mineral loss (ΔIML) from transverse-microradiography. The distributions of F and Sr were analyzed by the PIGE/PIXE technique. The micro-PIGE/PIXE technique indicated a fluorine uptake difference between the enamel surface and enamel cavity wall. ΔIML of FSCMs were significantly lower than intact enamel. The micro-PIGE/PIXE technique enables measurement of F and Sr uptake from FSCMs into enamel, which would be beneficial for research on caries development and prevention.

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“…The X-ray imaging of a biological sample with a very small source size was tested by using a proton microprobe system [9,10] at JAERI Takasaki. The experimental setup is illustrated in Fig.…”

Section: Application Of a Proton Microprobementioning

confidence: 99%

Imaging by using proton-induced quasi-monochromatic X-ray emission

Iwatani¹,

Kaneko²,

Hasegawa³

et al. 2004

Science and Technology of Advanced Materials

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Quasi-monochromatic X-ray emission induced by MeV-proton bombardment onto metallic targets was applied to radiography of small samples. The X-ray energy was adjusted in the range of z4-23 keV by changing the target material. The radiograms were recorded on an imaging plate. A small phantom made of Lucite was prepared for the test of photography using a contrast medium (RuCl 3 $H 2 O; ruthenium chloride). To clearly observe the image of the contrast agent, the photon energy was chosen to be 23.17 keV (Cd Ka) which is slightly above the K-absorption edge of Ru at 22.12 keV. Only the image of the contrast agent was successfully extracted by subtracting the image taken by 21.18-keV X-rays (Pd Ka) from that obtained by the 23.17-keV photons. Also images of a small fish sample were taken using a point-like X-ray source excited by a proton microbeam with a diameter of z10 mm. In this experiment, the X-ray energy was adjusted to 4.51 keV (Ti Ka) to obtain a strong attenuation by Ca in the bones. A fine structure of the bones in the thin caudal fin (!100 mm) was highly contrasted by this method. The spatial resolution of the picture was z20 mm. Performance of the above technique based on the proton-induced quasimonochromatic X-ray emission is discussed in comparison to conventional methods. q

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JAERI Takasaki in-air micro-PIXE system for various applications

Cited by 75 publications

References 8 publications

Preliminary Study on the Elemental Quantification of in Ambient Liquid Samples of Microliter Volume Using the In-air Micro-PIXE Technique

Preliminary Study on the Elemental Quantification of in Ambient Liquid Samples of Microliter Volume Using the In-air Micro-PIXE Technique

A new technique for analyzing trace element uptake by human enamel

Imaging by using proton-induced quasi-monochromatic X-ray emission

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