Description of Stabilization of Octupole Deformation in Alternating-Parity Bands of Heavy Nuclei
E. V. MardybanBogoliubov Laboratory of Theoretical, Joint Institute for Nuclear Research aaa, Dubna, Moscow oblast, 141980, RussiaT. M. ShneidmanBogoliubov Laboratory of Theoretical, Joint Institute for Nuclear Research aaa, Dubna, Moscow oblast, 141980, RussiaЕ. А. КолгановаBogoliubov Laboratory of Theoretical, Joint Institute for Nuclear Research aaa, Dubna, Moscow oblast, 141980, RussiaR. V. JolosBogoliubov Laboratory of Theoretical, Joint Institute for Nuclear Research aaa, Dubna, Moscow oblast, 141980, Russia
2020en
ABI
Аннотация
The angular-momentum dependences are analyzed for parity splitting and electric dipole transitions in alternating-parity bands of heavy nuclei. It is shown that these dependences can be treated universally by employing a single parameter taken to be a critical angular momentum that characterizes the phase transition from octupole vibrations to a stable octupole deformation. Analytic expressions for parity splitting and the electric dipole transitional moment are obtained on the basis of a simple model. The results are compared with experimental data for various barium, cerium, and neodymium isotopes.
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