Electromagnetic spin and orbital angular momenta of a classical point electron

The bound momentum and the bound angular momentum of a point particle with arbitrary multipolar electromagnetic moments are considered. It is found that the relation M/sup (b)//sub lambdaμ/(tau) = 2z/sub [lambdap/sup (b)/μ]/(tau), which was established for a nonspinning accelerated point charge, is no longer true in the present case. An additional term emerges, which corresponds to the contribution to the bound angular momentum of the multipolar structure of the particle