A model of a quadrupole–octupole vibrating and rotating core plus a particle is proposed to describe and classify the quasi-parity-doublet spectra in odd-mass nuclei. The yrast levels are described as low-energy rotation–vibration modes built on the ground state. The non-yrast split parity-doublet sequences are considered as higher-energy rotation–vibration modes coupled to one-quasi-particle states. The even–even core is considered within the model of a coherent quadrupole–octupole motion, while the odd nucleon is described within the reflection-asymmetric deformed shell model with pairing interaction. The Coriolis decoupling and K-mixing interactions are calculated microscopically through a parity projection of the single-particle wave function. The unified model scheme was tested on the yrast and non-yrast quasi-parity-doublet spectra in the nuclei 223Ra and 221Fr.


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    Title :

    A model for quasi-parity-doublet spectra in odd-mass nuclei


    Contributors:

    Published in:

    Physica Scripta (Online) ; 2013 , T154 ; 014017/1-014017/6


    Publication date :

    2013


    Size :

    6 Seiten, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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