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Beam Resonance Measurements of Atomic Quadrupole Moments

  • P. G. H. Sandars
  • A. J. Stewart

Abstract

The starting point for this work is the well-known multipole expansion of the interaction between a charge distribution and an externally applied electrostatic field. For an atom in a laboratory field the expansion converges rapidly since it is a power series in the ratio of the size of the atom to the dimensions of the electrodes producing the field. A further simplification occurs when the field is sufficiently weak that it can be treated in first order because then the odd order multipoles vanish for reasons of parity and time-reversal symmetry. In addition, the monopole term is zero because an atom has no net charge. It follows that not only is the quadrupole moment the first non-vanishing multipole moment for an atom, it is also the only one which it is possible to measure directly through its interaction with a laboratory applied field.

Keywords

Quadrupole Moment Electric Field Gradient Quadrupole Interaction Central Field Beam Resonance 
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

© Plenum Press, New York 1973

Authors and Affiliations

  • P. G. H. Sandars
    • 1
  • A. J. Stewart
    • 1
  1. 1.Clarendon LaboratoryOxford UniversityUK

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