Is the Electron Orbital g-Factor Equal to 1 Exactly?

Details Is the Electron Orbital g-Factor Equal to 1 Exactly? Is the Electron Orbital g-Factor Equal to 1 Exactly?

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprl14002a&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #L14.002

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An important question addressed by Kusch et al in their pioneering experiments may be put as follows: If the electron g-factors are assumed corrected such that gL=1+δL andgS=2+δS, what are the measurable magnitudes of δLand δS? To answer this question, Kusch et al used the resonance Zeeman technique with which they measured the quantityδS-2δL=aSL. At that time, no independent value of δS,or,Lwas available, hence it was not possible to separately determine the two unknowns (δL,,S). It was a practical necessity therefore to assume a value for one in order to determine the other, hence it was assumed that δL=0. However, six decades have passed since Kusch et al skillfully measured the quantity aSL=δS-2δL, carefully eliminating bound state contributions. In sequel, experimentalists have independently of δL, measured δS with increasing precision and accuracy. A culmination of these efforts is the recent measurement of δS by Gabrielse et al. In view of the success recorded in the measurement of δS, the question posed by Kusch et al will be reopened/discussed: Is it empirically justified to set δL equal to zero exactly? If we combine the recent measurement of δS, together with that of (δS-2δL), then it appears thatδL=(-0.6±0.3)x10-4. Does this imply that the electron orbital g-factor is also corrected?

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