Angular correlation between ejectedLelectrons andαparticles inPo210decay

Abstract
The angular correlation between α particles and electrons emitted from the L atomic shell during Po210 α decay has been measured over an angular range from 0° to 90° for electrons in the energy range from 5 to 20 keV. The angular distribution of the α particles in the forward hemisphere with respect to the direction of the electrons was found to be almost isotropic with no strong forward peaking. Implications of this result on the hypothesis of electron pickup by α particles are discussed.