We have measured the relative population in the two mj states of barium 6p1/2 ions produced by the autoionization of (6p3/2nd)J=MJ=3 states by detecting the helicity of the emitted fluorescence. These populations can be related to the relative branching ratio into the 6p1/2εd5/2 and 6p1/2εg7/2 continuum channels. Rydberg states with n=16-23 have similar branching ratios, producing approximately six times as much 6p1/2εd5/2 population as 6p1/2εg7/2 population.
G. T. Xu et al., "Residual-Ion Orientation After Autoionization," Physical Review A, vol. 47, no. 4, pp. R2438-R2441, American Physical Society (APS), Apr 1993.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.47.R2438
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