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  • 2000-2004
  • 1975-1979  (3)
  • 1915-1919
  • 1979  (3)
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  • 2000-2004
  • 1975-1979  (3)
  • 1915-1919
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  • 1
    Electronic Resource
    Electronic Resource
    Radiocarbon measurements on submerged forest floating chronologies (1979)
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 409-413 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The submerged forests along the west coast of England and Wales provide a unique source of wood for radiocarbon/dendrochronological studies. We report 14C age determinations on sequential growth increments from three ‘floating’ chronologies. A sampling frequency of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/278409a0
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Positron trapping and self-diffusion activation energies in chromium (1979)
    Springer
    Applied physics 19 (1979), S. 149-152 
    Details
    ISSN: 1432-0630
    Keywords: 78.70 ; 66.30 F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The activation energy for self-diffusion in chromium is found to be 3.51±0.13 eV from positron trapping measurements. The 4.51 eV activation energy seen in tracer diffusion work is therefore ascribed to divacancies, theQ 2/Q 1 ratio being typical of the bcc refractory group. The positron data give 0.55 for the ratioH 1v M /H 1v F of vacancy migration and formation energies, in agreement with quenching data for tungsten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00932389
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Positron trapping in cobalt and trapping threshold temperature correlations (1979)
    Springer
    Applied physics 19 (1979), S. 269-273 
    Details
    ISSN: 1432-0630
    Keywords: 78.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The monovacancy formation energy of Co is measured as 1.91 eV from a trapping model analysis of theT-dependence of the lineshape parameter. Previously discussed linear relationships between trapping threshold temperature and monovacancy parameters are refined; these relationships can now be regarded as well-established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900470
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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