The anomalous quadrupole collectivity in Te isotopes

Abstract

We present systematic calculations on the spectroscopy and transition properties of even-even Te isotopes by using the large-scale configuration interaction shell model approach with a realistic interaction. These nuclei are of particular interest since their yrast spectra show a vibrational-like equally-spaced pattern but the few known E2 transitions show anomalous rotational-like behavior, which cannot be reproduced by collective models. Our calculations reproduce well the equally-spaced spectra of those isotopes as well as the constant behavior of the $B(E2)$ values in ${}^{114}$Te. The calculated $B(E2)$ values for neutron-deficient and heavier Te isotopes show contrasting different behaviors along the yrast line. The $B(E2)$ of light isotopes can exhibit a nearly constant bevavior upto high spins. We show that this is related to the enhanced neutron-proton correlation when approaching $N=50$.

arXiv comment7 pages, 4 figures, submitted to PRC

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Cited by in corpus (7)

• Recent progress in configuration-interaction shell model
• Quasi-$\gamma$ band in ${}^{\text{114}}$Te
• Shape transition and coexistence in Te isotopes studied with the quadrupole collective Hamiltonian based on a relativistic energy density functional
• Coulomb excitation of ${}^{124}$Te: Emerging collectivity and persisting seniority structure in the $6_1^{+}$ level
• Description of the critical point symmetry in 124Te by IBM-2
• Partial conservation of seniority in semi-magic nuclei
• Effects of shape coexistence and configuration mixing on low-lying states in tellurium isotopes