Evidence for interference between resonant and nonresonant transfer and excitation

The first angular distribution measurements of Auger electrons arising from transfer and excitation Auger (TE) processes were performed at O{sup 5+} projective energies of 8 MeV, where the resonant (RTE) and the nonresonant (NTE) transfer and excitation have equal contributions in populating the (1s2s2p{sup 2}){sup 3}D state, and at 13 MeV where RTE is predominant and at 6 MeV where NTE is more significant. The TE angular distributions are strongly forward peaked along the beam direction. The data were fitted to w({theta}{sub p})=C[1+a{sub 2}P{sub 2}(cos{theta}{sub p})+a{sub 4}P{sub 4}(cos{theta}p)] and the magnetic substate population probabilities were inferred.