Abstract
An analysis of \({}^{74-82}\mathrm{{Se}}\) within the framework of the interacting boson model (IBM) and the few-body aspects are presented. Selenium isotopes with mass number (A) ranging from 74 to 82 are typical vibrational nuclei that can be explained by the U(5) limit of the IBM. However, they are not fully symmetrical nuclei, and are represented by adding a perturbation term to account for the symmetry breaking. These nuclei tend to exhibit properties of a harmonic oscillator and an asymmetric deformed rotor. The low-energy level and B(E2) ratios are calculated using the IBM via direct diagonalization of the perturbed Hamiltonian and the E(5) symmetry breaking. Comparisons between the theoretical and experimental results of the even-even selenium isotopes with A ranging from 74 to 82 are presented.
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