A microscopic description of alpha decay of odd mass nuclei is given f
or axially deformed nuclei. Realistic mean field+pairing residual inte
raction in a very large single particle basis is used. Systematics for
At and Rn isotopes, as well as for Fr-221, are given. A pronounced an
isotropic emission of alpha particles at low temperatures is predicted
as function of deformation for the At and Rn isotopes. This shows tha
t alpha decay is an excellent tool to probe intrinsic deformations in
nuclei.