Abstract
We have measured the circular polarization of photons emitted after electron capture into the B{sup 2+}(1{ital s}{sup 2}2{ital p}) state in B{sup 3+}(1{ital s}{sup 2})+He(1{ital s}{sup 2}) collisions in a planar scattering experiment, using the polarized-photon--scattered-ion coincidence technique. The energy is 1.5--12 keV and scattering angles {theta} are less than 1.5{degree}. For large impact parameters a {ital strong} {ital propensity} {ital for} {ital orientation} is observed, with the sense of electron orbiting in the {ital same} direction as the rotation of the internuclear axis being favored by more than a factor of 2 compared to the opposite orientation. This is in qualitative agreement with recent theoretical predictions.
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