A NEUTRON-SCATTERING INVESTIGATION OF THE MAGNETIC FORM-FACTOR FOR THE INTERMULTIPLET TRANSITIONS IN SM AND SMPD3

Magnetic form factor calculations for the rare-earth ions, made by Bal car and Lovesey, have been tested experimentally, for the case of Sm3 ions in Sm metal and SmPd3, by using the neutron scattering technique . In the various experiments performed the H-6(5/2) --> H-6(7/2) spin- orbit transition and the intermultiplet transitions H-6(5/2) --> F-6(1 /2), H-6(5/2) --> F-6(3/2), H-6(5/2) --> F-6(5/2) and H-6(5/2) --> F-6 (7/2) have been observed. The variation of the intensities of these pe aks with the neutron momentum transfer is discussed with respect to th e predictions of Balcar and Lovesey.