NEW METHOD FOR MEASURING THE FINE STRUCTURE CONSTANT USING STARK SPECTROSCOPY.

Michael G. Littman, William D. Phillips

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

An experiment to determine a value for alpha , the fine structure constant, is proposed. The detemination is to be based on a measurement of the Stark effect of hydrogen Rydberg states. Hydrogen atoms in a uniform field of known strength will be excited to Rydberg levels using intense tunable lasers. The presence of excited atoms is detected using the sensitive technique of field ionization. A precise measurement of the linear energy shift of an extreme Stark state is to be made, and from this measurement, in conjunction with reported values of R// infinity , the Rydberg constant, and 2e/h, the Josephson frequency-voltage ratio, a value of alpha are determined. The estimated accuracy of the determination is expected to be competitive with or better than the 0. 11 ppm accuracy of the current best non-QED determination of alpha .

Original languageEnglish (US)
Pages (from-to)173-176
Number of pages4
JournalNational Bureau of Standards, Special Publication
StatePublished - Dec 1 1984

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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