Decay of 210At to levels in 210Po

Abstract The electron-capture decay of 210 At has been reinvestigated and present data define twenty-three levels in 210 Po. The multipolarity of thirty-six transitions have been measured and combined with data from recent reaction studies to assign spins and parities to these levels. Evidence is presented which locates the 3 − collective level in 210 Po at 2387 keV above the ground state. The electron-capture transition rates to odd-parity levels are discussed with reference to the particle-hole excitations in 208 Pb. Transition probabilities for γ-decay of members of the π( h 9 2 f 7 2 ) multiplet are compared to predictions from recent theoretical calculations.