“Staggering” Effect in Even-even Nuclei with Quadrupole and Octupole Deformations

Quasi-γband and odd-even staggering effect in 102Ru

Parity shift and beat staggering structure of octupole bands in a collective model for quadrupole–octupole deformed nuclei

We propose a collective model formalism which describes the strong parity shift observed in low-lying spectra of nuclei with octupole deformations together with the fine rotational band structure developed at higher angular momenta. The parity effect is obtained by the Schrödinger equation for oscillations of the reflection asymmetric (octupole) shape between two opposite orientations in an ang...

Staggering behavior of the low lying excited states of even-even nuclei in a Sp(4,R) classification scheme

We implement a high order discrete derivative analysis of the low lying collective energies of even-even nuclei with respect to the total number of valence nucleon pairs N in the framework of F spin multiplets appearing in a symplectic sp(4, R) classification scheme. We find that for the nuclei of any given F multiplet the respective experimental energies exhibit a ∆N = 2 staggering behavior an...

Odd-Even Staggering of Nuclear Masses: Pairing

The odd-even staggering of nuclear masses was recognized in the early days of nuclear physics. Recently, a similar e ect was discovered in other nite fermion systems, such as ultrasmall metallic grains and metal clusters. It is believed that the staggering in nuclei and grains is primarily due to pairing correlations (superconductivity), while in clusters it is caused by the Jahn-Teller e ect. ...

Modeling the Shape: Some Contemporary Approaches to Quadrupole-Octupole Deformations in Atomic Nuclei

We will briefly review a few collective and microscopic model approaches currently developing with the aim to explore nuclear dynamic properties ensuing from the appearance of quadrupole-octupole deformations. We will depict the present status of the study of alternating-parity spectra in even-even nuclei and parity quasi-doublet sequences in odd-mass nuclei. Different model limits of octupole ...