Fine structure in the alpha decay of 191g,mBi and 193g,mBi

Two new hindered α transitions are presented for 191Bi and 193Bi. The α-γ coincidence method was used to search for these weak transitions. The new alpha particle energies for 191Bi are 6581(9) keV and 6343(5) keV and for 193Bi the energies are 6160(10) keV and 5860(15) keV.