Alpha decay of [sup 216]At and the level structure of [sup 212]Bi

The level structure of [sup 212]Bi has been studied by observing the alpha decay of [sup 216]At which is in secular equilibrium with [sup 220]Fr and [sup 224]Ac. Eight states are observed and tentatively assigned to the configuration [pi][ital h][sub 9/2][nu]([ital g][sub 9/2])[sup 3] and three to the configuration [pi][ital h][sub 9/2][nu]([ital g][sub 9/2])[sup 2][ital i][sub 11/2]. These two lowest configurations in [sup 212]Bi are compared with the corresponding configurations in [sup 210]Bi and the calculations of Warburton.