E1Transitions from the Septuplet inBi209

$E1\mathrm{}$ transition rates from the septuplet of ${\mathrm{Bi}}^{209}$ are analyzed using a simple model in which a direct coupling between the octupole and the dipole states of the core nucleus ${\mathrm{Pb}}^{208}$ is taken into account. It is shown that by using reasonable parameters one can get results which are consistent with the observed decay rates.