Description of nuclear octupole and quadrupole deformation close to the axial symmetry: Critical-point behavior of 224Ra and 224Th

Abstract

The model, introduced in a previous paper, for the description of the octupole and quadrupole degrees of freedom in conditions close to the axial symmetry, is applied to situations of shape phase transitions where the quadrupole amplitude can reach zero. The transitional nuclei 224,226Ra and 224Th are discussed in the frame of this model. Their level schemes can be reasonably accounted for assuming a square-well potential in two dimensions. Electromagnetic transition amplitudes are also evaluated and compared with existing experimental data.

arXiv comment11 pages, 9 figures

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• Octupole deformation in light actinides within an analytic quadrupole octupole axially symmetric model with Davidson potential
• Description of nuclear octupole and quadrupole deformation close to the axial symmetry: Octupole vibrations in the X(5) nuclei 150Nd and 152Sm
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• Non-yrast spectra of odd-A nuclei in a model of coherent quadrupole-octupole motion
• Simultaneous description of low-lying positive and negative parity bands in heavy even-even nuclei
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• Inter-band B(E1) Strengths in Heavy Nuclei based on the Proxy-SU(3) Scheme