Abstract
The Bohr-Mottelson collective model is worked out in detail for even- and odd-mass nuclei with stable octupole deformations. Allowance is made for rotation-vibration coupling effects. The transition from octupole vibrations around a spheroidal shape to stable octupole deformation is discussed. The model is applied to the low-lying states of 19F, and reasonable agreement with the experimental data is obtained.
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