α particle angular distributions of 189,191,193Bi

Angular distribution data for ct particles emitted in the favored decay of on-line oriented neutron deficient isotopes Bi-189,Bi-191,Bi-193 near midshell (N=104) are presented. They give additional support for the recent finding that anisotropic alpha emission in favored decays from near-spherical nuclei is mainly determined by nuclear structure effects. [S0556-2821(98)03611-5].