Hydrogen concentrations in thin self-supporting samples of polyphenylene sulfide (PPS) and muscovite have been determined by nuclear-elastic recoil detection analysis (ERDA) of transmission layout. The analysis procedure is based only on the database of stopping power and recoil cross section for material analysis, without using any reference sample of known H content. For the PPS sample, the determined value of(2.87±0.26)×1022H cmis in good agreement with the calculated value of3.01×1022H cm. For the muscovite sample, the H concentration originating each from bound water and absorbed water is uniform over the entire thickness of the sample. The determined concentration(9.43±0.75)×1021H cmof the muscovite agrees excellently with the value of9.36×1021H cmobtained from other quantitative analyses typically applied for minerals. The present results demonstrate the capability of accurate determination of H contents in materials and minerals by transmission ERDA.
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http://dx.doi.org/10.1088/1361-648X/ac8b4e | DOI Listing |
J Phys Condens Matter
August 2022
Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
Hydrogen concentrations in thin self-supporting samples of polyphenylene sulfide (PPS) and muscovite have been determined by nuclear-elastic recoil detection analysis (ERDA) of transmission layout. The analysis procedure is based only on the database of stopping power and recoil cross section for material analysis, without using any reference sample of known H content. For the PPS sample, the determined value of(2.
View Article and Find Full Text PDFJ Phys Condens Matter
September 2021
Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
Using stacked samples of Al foil and H-containing resin film, we have carried out elastic recoil detection analysis with transmission layout (T-ERDA) to investigate the depth resolution in the measurements of H distribution in Al. For narrow and wide acceptance conditions of the detector, the depth resolutions of 1.5-4.
View Article and Find Full Text PDFSci Technol Adv Mater
September 2019
Laboratory for Nanoscale Materials Science, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland.
Optically transparent, colorless Al-O-N and Al-Si-O-N coatings with discretely varied O and Si contents were fabricated by reactive direct current magnetron sputtering (R-DCMS) from elemental Al and Si targets and O and N reactive gases. The Si/Al content was adjusted through the electrical power on the Si and Al targets, while the O/N content was controlled through the O flow piped to the substrate in addition to the N flow at the targets. The structure and morphology of the coatings were studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM), while the elemental composition was obtained from Rutherford backscattering spectrometry (RBS) and heavy ion elastic recoil detection analysis (ERDA).
View Article and Find Full Text PDFNanomaterials (Basel)
November 2019
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China.
A series of helium (He) charged nanograin-sized erbium (Er) films were deposited by direct current (DC)-magnetron sputtering with different He/Ar mixture gases. The microstructure and mechanical properties of He-charged Er films were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), and nanoindentation. The helium concentrations in Er films, determined by elastic recoil detection analysis (ERDA), ranged from 0 to 49.
View Article and Find Full Text PDFCLAO J
January 2002
Department of Ophthalmology, Trakya University Medical School, Edirne, Turkey.
Purpose: To determine if there are any corneal endothelial cell size and shape changes (and the time course of these changes) in subjects wearing rigid high gas-permeable (RGP) contact lenses for daily wear.
Methods: Ninety-seven eyes of 57 new wearers were fitted with a fluoroperm contact lens material (Persecon92E, oxygen transmissibility (Dk)= 92 x 10(-11)). Prior to lens wear and after 1 week, 1 month, 3 months, 6 months, and 1 year, noncontact endothelial photographs were taken.
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