Abstract
An experimental value for the g-factor of the 7 2 proton is derived from the measured magnetic moment of the 14 1 + state in 214Ra (nominal configuration |( h 9 2 5 21 2 f 7 2 ; 14 +〉) using the multiparticle-octupole-coupling model. The result, g( f 7 2 ) = 1.41(2) , is smaller than anticipated by theories which assume first-order core-polarization corrections to the proton spin g-factor together with an anomalous orbital magnetism of about 0.12. The experimental value suggests the proton spin g-factor g s may be quenched, in this orbital, to about half the bare-nucleon value, similar to that found for the 0 h 9 2 and 0 i 13 2 protons, or, alternatively, that the anomalous orbital magnetism is much reduced for the l f 7 2 orbital.
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