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Akademický článek
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Autor:
B. Warrington, N. Bignell, W.J. Giardini, Esa Jaatinen, P.J. Manson, B.R. Ward, M.J. Wouters, M.J. Kenny, Christopher J. Walsh
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 58:908-914
The density of a single-crystal natural silicon sphere identified as ldquoAvo#3rdquo has been redetermined at the National Measurement Institute, Australia (NMIA), as part of an international collaboration to determine the value of the Avogadro const
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a18092ae7290d8a027d5c6c8a28e764
https://doi.org/10.1109/tim.2008.2007052
https://doi.org/10.1109/tim.2008.2007052
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 52:641-645
A number of measurement institutes are working together toward a determination of the Avogadro constant with a relative combined standard uncertainty of 10/sup -8/. This will enable a definition of the kilogram based on the mass of a specific number
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::851847ad2879f76bad1b3d465fccee05
https://doi.org/10.1109/tim.2003.810723
https://doi.org/10.1109/tim.2003.810723
Autor:
H. S. Peiser, S. Pettorruso, S. Valkiers, M. Tanaka, R. Kessel, A. Peuto, Peter Becker, A. Waseda, P. De Bièvre, Horst Bettin, Richard D. Deslattes, Philip D. P. Taylor, Kenichi Fujii, M.J. Kenny
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 50:593-597
An "absolute" value for the molar volume of Si in Si single crystals is presented as 12.058 820 7(54) cm/sup 3/ mol/sup -1/ with a relative standard uncertainty of 4.5/spl middot/10/sup -7/. It is argued that the consistency of most of the molar volu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81ab6d385ff93c475adf1aa049c3ce4a
https://doi.org/10.1109/19.918199
https://doi.org/10.1109/19.918199
Autor:
W.J. Giardini, L.S. Wielunski, B.R. Ward, Roger P. Netterfield, K. Fen, M.J. Kenny, Christopher J. Walsh, Achim J. Leistner
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 50:587-592
Density measurements with relative uncertainty of 1/spl times/10/sup -7/ have been made on a highly polished 1-kg single crystal silicon sphere with out-of-roundness
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6831f4cad0efcdc5726f8c8c9b74d10d
https://doi.org/10.1109/19.918198
https://doi.org/10.1109/19.918198
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 48:233-237
The Avogadro constant is required to be determined with an uncertainty of less than 1/spl times/10/sup -8/ in order to allow an atomic definition of the kilogram. A single-crystal silicon sphere 93.6 mm diameter is used for this determination. A thin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca8510dd0f1deed0ed344c6357dcd592
https://doi.org/10.1109/19.769571
https://doi.org/10.1109/19.769571
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 46:572-575
Silicon single-crystal spheres for use in accurate determination of the Avogadro constant are fabricated by optical grinding and polishing. Surface profiling of the deviation from sphericity of the spheres shows a strong cubic symmetry on the scale o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::970bf48187fd57af8ca7b907bc94472e
https://doi.org/10.1109/19.571918
https://doi.org/10.1109/19.571918
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :262-266
Plasma immersion ion implantation has a potential advantage over conventional line-of-sight ion implantation in being able to provide a uniform dose over a nonplanar surface. Operating regimes are different for each process leading to different surfa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::118c47cbf688dafc340aba5ab219f18a
https://doi.org/10.1016/0168-583x(93)96120-2
https://doi.org/10.1016/0168-583x(93)96120-2
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 55:522-526
A manipulator incorporating a number of novel features has been built for a research ion implanter. The system is designed to enable uniform dose implantation of both planar and nonplanar surfaces by incorporating one translational and two rotational
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d7ab8dd63f31a107749036c7c1cd520
https://doi.org/10.1016/0168-583x(91)96224-9
https://doi.org/10.1016/0168-583x(91)96224-9