Spectroscopy ofαandK- andL-Electron Continua andL-Electron Pickup inPo210αDecay

The continuous low-energy electron distributions emitted from $K$ and $L$ atomic shells in a small fraction of ${}_{}{}^{210}{}_{}{}^{}\mathrm{Po}$ $\alpha$ decays have been measured from 6 to 100 keV. The corresponding complementary $\alpha$ satellite continua have been measured. Electron and $\alpha$ shapes agree well, but disagree with all extant predictions. $K$ and $L$ emission probabilities were determined. About 65% of the $L$ (but very few of the $K$) electrons ejected are captured into bound states of the $\alpha$ particle.