Abstract

The beam-foil light source was used for a study of the Stark effect on He II ($\ensuremath{\lambda}4686$\AA{}) and ${\mathrm{H}}_{\ensuremath{\beta}}$. For the former, the $p$ and $s$ components were detected for transverse and longitudinal fields. The transverse-field data suggest that levels of high $j$ are underpopulated relative to their equilibrium numbers. The longitudinal-field data are anomalous. For ${H}_{\ensuremath{\beta}}$, splitting was observed, but the arrangement precluded the detection of polarization. The data also imply underpopulation of levels of high $j$.

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