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Collision Broadening and Radio-frequency Spectroscopy

  • Brebis Bleaney

Abstract

Spectroscopy naturally began at optical wavelengths, then spread to the ultraviolet and infrared. Gas discharge tubes at low pressures reduced collision broadening; narrow lines and interferometric techniques made possible high-resolution spectrometry, including hyperfine structure. Wolfgang Pauli’s interpretation of this as due to nuclear spin [1], was soon followed by a measurement in Oxford of the hyperfine structure of caesium by Derek Jackson [2]. From this, he estimated a value for the nuclear magnetic moment of 133Cs, though the nuclear spin was not known. (In later years, he remarked: “Sommerfeld did it by wave mechanics; I did it by arithmetic”) Discharge tubes with cathodes cooled in liquid air were used to reduce Doppler broadening.

Keywords

Electron Paramagnetic Resonance Nuclear Spin Hyperfine Structure Ammonia Molecule Nuclear Magnetic Moment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York, Inc. 1996

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  • Brebis Bleaney

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