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  • 1
    Electronic Resource
    Electronic Resource
    Phosphorus-Implanted Glass for Radiotherapy: Effect of Implantation Energy (1999)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 82 (1999), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A chemically durable glass that contains a large amount of phosphorus is useful for in situ irradiation of cancers. It can be activated to be a β-emitter with a half-life of 14·3 d by using neutron bombardment. Microspheres of the activated glass that are injected to tumors can irradiate the tumors directly with β-rays without irradiating neighboring normal tissues. In the present study, P+ ions in various doses have been implanted into a pure silica glass in a plate form at 200 keV. Almost all the implanted phosphorus is present in the inner region of the glass rather than in the surface region, taking the form of phosphorus colloids for all the doses in the range of 5 × 1016-1 × 1018 cm-2. A large number of amorphous phosphorus colloid particles with diameters of 10-150 nm are formed in the silica glass that has been implanted with a dose of 1 × 1018 cm-2; these colloid particles are distributed widely in a layer that is centered at a depth of 200-250 nm. All the investigated glasses hardly release any phosphorus and silicon into water at a temperature of 95°C, even after 7 d. A silica glass that has been implanted with P+ ions at 200 keV with a dose of 1 × 1018 cm-2 is believed to be useful as a radiotherapy glass with sufficient phosphorus content and high chemical durability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1999.tb01817.x
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  • 2
    Electronic Resource
    Electronic Resource
    Size and Charge Effects of Dopant M on the Unit-Cell Parameters of Monoclinic Zirconia Solid Solutions Zr0.98M0.02O2 –δ (M = Ce, La, Nd, Sm, Y, Er, Yb, Sc, Mg, Ca) (1997)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 80 (1997), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The crystal structure of monoclinic phase [P21/cZ= 4] has been refined by the Rietveld analysis of X-ray powder diffraction data to study the size and charge effects of dopant Mn+ on the unit-cell parameters of monoclinic ZrO2−2 mol% MOn/2 solid solutions (n= 4 for M = Ce; n= 3 for M = La, Nd, Sm, Y, Er, Yb, Sc; and n= 2 for M = Mg and Ca). For trivalent dopant (n= 3), the unit-cell parameters am, bm, cm and unit-cell volume increase and βm decreases with an increase of dopant size. Unit-cell volume increases with increasing of dopant charge n.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1997.tb02806.x
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