PHOTON POLARIZATION IN THE HE-4(GAMMA,(D)OVER-RIGHT-ARROW)H-2 REACTION

We derive double polarization observables for the photodisintegration of He-4 with an incident polarized photon beam. In particular we study the effect of the ground state alpha-particle D wave on these observa bles in a simple nuclear model. We find that in general the double pol arization observables offer no clear advantage to the corresponding va riables studied in the single polarization He-4(gamma,(d) over right a rrow)H-2 reaction. However, the photon asymmetry Sigma appears as a pr omising observable for the study of ground state effects.