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  • When nuclei catch up with electrons

    Understanding the dynamics of quantum-mechanical systems on their natural time scale is the main goal in attosecond science. Among the most interesting systems to investigate are molecules, which have a very high degree of complexity, in particular when compared to atomic systems. So far, the few at more

  • ZEISS acquires majority stake in Italian x-ray provider

    ZEISS (Germany) and BOSELLO HIGH TECHNOLOGY (BOSELLO) (Italy) have announced that the ZEISS Group will acquire a majority stake in the provider of industrial X-ray solutions.For ZEISS, BOSELLO’s tailor-made solutions are a further step in the process of evolving into a one-stop provider of non-destr more

  • 'Noise thermometry' yields accurate new measurements of Boltzmann constant

    By measuring the random jiggling motion of electrons in a resistor, researchers at the National Institute of Standards and Technology (NIST) have contributed to accurate new measurements of the Boltzmann constant, a fundamental scientific value that relates the energy of a system to its temperature. more

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  • The Best Measurement

    It is now more than 30 years since attempts started to find a way of defining the kilogram based on an atomic constant or a fundamental physical constant. Since then, two methods have advanced sufficiently far to make it likely that there will be a new definition within the coming years, namely the Watt balance ­experiment for determination of Planck‘s constant h and the Avogadro experiment for determining the ­Avogadro Constant NA. more

Authors Metrology

  • Dr. Martina Hedrich

    Martina Hedrich studied chemistry at Freie Universität Berlin (FUB), where she also received her doctorate in inorganic chemistry in the field of X-ray structure analysis. During her postdoc at the Hahn Meitner Institute in Berlin, she dedicated her work to trace analysis in human tissue samples bef more

  • Dr. Peter Becker

    studied physics at the University of Münster and received his doctorate in 1974 from the Institut für Physik der Universität Dortmund (Dortmund University Institute of Physics). From there he moved to Physikalisch-Technischen Bundesanstalt (National Metrology Institute) in Braunschweig (Brunswick). more

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