AN INVESTIGATION OF THE CROSS-SECTION FOR MAGNETIC COMPTON-SCATTERING

The existence of a term in the cross section for inelastic photon scat tering of circularly polarised photons which is dependent on orbital m agnetisation has been proposed and.supported by evidence, from one Com pton scattering experiment carried out at 45 keV. The integrated inten sity of the Compton scattering is studied as a function of the angle b etween the incident beam and the direction of magnetisation. Further m easurements of a similar nature on the same samples, Fe, Co, HoFe2, wh ich have produced negative results, are reported here. These latest re sults, which were obtained at two different synchrotron rings (the Dar esbury Storage Ring and the KEK Accumulation Ring), throw doubt upon t he importance of such effects in the Compton limit.