By performing alpha-gamma-coincidence measurements, more precise data
on the weak At-217 alpha-decay to excited levels of Bi-213 have been o
btained. A new branch of the alpha-decay (0.005% per decay) to the 758
.9 keV Bi-213 level is observed. The structure of the proposed Bi-213
levels (0.0 keV 9/2(-), 257.9 keV 7/2(-), 593.1 keV (5/2-9/2)(-) and 7
58.9 keV (5/2-13/2)(-)) is discussed in the framework of the shell mod
el.