  An analytic, parameter-free (up to overall scale factors) solution of the
Bohr Hamiltonian involving axially symmetric quadrupole and octupole
deformations, as well as an infinite well potential, is obtained, after
separating variables in a way reminiscent of the Variable Moment of Inertia
(VMI) concept. Normalized spectra and B(EL) ratios are found to agree with
experimental data for 226-Ra and 226-Th, the nuclei known to lie closest to the
border between octupole deformation and octupole vibrations in the light
actinide region.
