An IBM description of76Se and neighbouring Se-isotopes

Shape coexistence inSe72investigated following theβdecay ofMcCutchan1, Lister2, Ahn3 et al. 2011Phys. Rev. C212230View full textAdd to dashboardCite

“…The Se isotopes have been described by IBM-2 calculations, where a distinction is made between protons and neutrons. In these studies [21,22], it was found that the isotopes with N ≥ 40 could be well described, whereas significant discrepancies were found for the N < 40 isotopes, particularly in the energy of the 0 + 2 state. To incorporate the presence of shape coexistence, we performed IBM with configuration mixing [23,24] calculations (IBM-CM).…”

Investigation of some even-even selenium isotopes within the interacting boson model-2

“…However, if protons and neutrons are explicitly introduced then the model is known as IBM-2. The separation of the neutron (ν) and proton (π) bosons is the most important advantage of the IBM-2 [24], over the IBM-1, as well as calculating energies, E2 and M1 transitions between low-lying collective states [2].…”

“…The model with a single and simple Hamiltonian [2] is a valuable tool to understand the collective properties of nuclei spanning a large variety of their structures [15,20]. The simplest version of IBM is assumed that low-lying collective states in medium and heavy even-even nuclei [25] and IBM-1 are defined as a system of N bosons.…”

“…These parameters (C 0π = C 0υ and C 4π = C 4υ ) are totally equal for each neutron ( ν) and proton ( π) bosons, for angular momenta L=0 and L=4, respectively. In addition, the three Majorana parameters influence the energy of mixed-symmetric energy levels [2]. The parameters ξ 1 and ξ 3 can be equal because these terms correspond to seniority-conserving matrix elements.…”

“…These light isotopes exist between the semi-closed shell at the magic, N = 40 and N = 50, and their low-lying states in the mass region. The Selenium isotopes have been extensively studied by using the interacting boson model (IBM) [1][2][3][4][5][6] since these isotopes are nearly spherical and their low-lying energy levels structures show vibrational features. During the last decade, the above mentioned in addition to the isotopes of neighboring nuclei of selenium have been widely studied by using the same model [5][6][7][8][9][10][11][12].…”