• DocumentCode
    845158
  • Title

    Accuracy of the fine-structure constant

  • Author

    Kinoshita, Toichiro

  • Author_Institution
    Newman Lab., Cornell Univ., Ithaca, NY, USA
  • Volume
    38
  • Issue
    2
  • fYear
    1989
  • fDate
    4/1/1989 12:00:00 AM
  • Firstpage
    172
  • Lastpage
    174
  • Abstract
    The fine-structure constant α can be determined with a precision of better than a few parts in 107 in four independent ways. These methods are based on the AC Josephson effect, the quantized Hall effect, the muonium hyperfine structure, and the electron anomalous magnetic moment. A determination of α based on an improved theoretical calculation and on the Penning trap measurement of the electron anomalous magnetic moments has now reached a precision exceeding 10-8. Its implications for physics and metrology are discussed
  • Keywords
    atomic fine structure; constants; AC Josephson effect; Penning trap measurement; electron anomalous magnetic moment; fine-structure constant; metrology; muonium hyperfine structure; physics; quantized Hall effect; Electromagnetic measurements; Electron traps; Hall effect; Helium; Hydrogen; Josephson effect; Magnetic moments; Metrology; Physics computing; Protons;
  • fLanguage
    English
  • Journal_Title
    Instrumentation and Measurement, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9456
  • Type

    jour

  • DOI
    10.1109/19.192267
  • Filename
    192267
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=845158