Investigation of shape coexistence in 118–128Te isotopes

Abstract

In this paper, we have considered the interplay between phase transitions and configuration mixing of intruder excitations in the [118][119][120][121][122][123][124][125][126][127][128]

Lifetimes in Te124 : Examining critical-point symmetry in the Te nuclei

“…The quadrupole moments of the 2 + 1 levels in the evenmass stable Te nuclei are non-zero and comparable in magnitude to those observed in rotational nuclei [13]. For 124 Te, other characteristics such as the 0 + 2 level energy hint at O(6), or γ-soft rotational behavior as well, but the E(4 + 1 )/E(2 + 1 ) ratio is expected to be 2.5 for such structure; furthermore, the decay characteristics of the 0 + 2 level are not those predicted for an O(6) nucleus.…”

“…The underlying structure of 124 Te has proven to be difficult to characterize, notwithstanding a variety of experimental and theoretical investigations [1][2][3][4][5][6][7][8][9][10][11][12][13]. Structural ambiguities for the Te isotopic chain are readily apparent when one examines the mass dependence of selected levels.…”

Energy spectra and E2 transition rates of 124—130Ba

“…We have used the transitional Hamiltonian [35][36] to consider the evolution of these isotopes between spherical and gamma unstable shapes. Catastrophe formalism [37][38][39][40][41][42][43][44] is used to determine the exact values of control parameter for each nucleus and also present the energy surfaces.…”

“…To determine boson effective charges, we have used same method introduced in Refs. [11][12][34][35]. We have extracted these …”

Study of shape coexistence in the 180−190Hg isotopes by SO(6) representation of eigenstates

“…The analytic description of nuclear structure at the critical point of phase transitions has attracted extensive interest in the recent decades. One has to employ some complicated numerical methods to diagonalize the transitional Hamiltonian in these situations but we have proposed a new solution which was based on the SO (6) representation of eigenstates in this transitional region and has applied to some nuclei with total boson number N = 3 -5 [21][22]. 4 In this paper, we have considered the shape coexistence phenomena in the [180][181][182][183][184][185][186][187][188][189][190] Hg isotopes.…”