SIMPLIFIED DERIVATION OF THE AMPLITUDES FOR THE PHOTO-DISINTEGRATION OF THE DEUTERON WITH ARBITRARY NUMBER OF ELECTROMAGNETIC MULTIPOLES

By employing the interaction Hamiltonian in the operator form as derived by Breit and Rustgi, a simplified derivation of the amplitudes for the photodisintegration of the deuteron is reported, and the same expressions as given in an earlier paper are obtained. The derivation makes use of the Wigher-Eckart theorem and commutation relations between the spin matrices, but does not employ Racah coefficients. As in the earlier paper, the nonrelated approximation is used; the finalstate interaction of the outgoing neutron and proton is included. The effect of adding various electromagnetic multipoles on the cross-section and polarization is studied. © 1979 Società Italiana di Fisica.