Anomalous Orbital Magnetism of Proton Deduced from the Magnetic Moment of the 11- State of 210Po

The g factor of the 24-nsec (h₉₂i₁₃₂) 11^- state of ²¹⁰Po has been determined to be 1.090+/-0.016 by the spin-rotation method in the reaction ²⁰⁸Pb(α,2n). The anomalous g_l^{e f f} factor of 1.09+/-0.02 has been deduced from this value and the known g factor of h₉₂ under the assumption of the renormalized single particle operator μ-->=g_l^{e f f}l-->+g_s^{e f f}s-->.