A description of odd mass Xe and Te isotopes in the Interacting Boson–Fermion Model

Shape transitions in odd-mass γ -soft nuclei within the interacting boson-fermion model based on the Gogny energy density functional

“…[29]. From Tables IV and V [37] do not reproduce the B(E2; 7/2 − 1 → 11/2 − 1 ) transition rate in 131 Xe. Note, that the B(E2) and B(M 1) transition rates for 129 Xe are similar to the ones obtained in Ref.…”

“…Until now, a number of purely phenomenological IBFM calculations have already been performed in this mass region [31][32][33][34][35][36][37]. A virtue of the present approach is that, though its applicability is currently limited to nuclei where spectroscopic data are available, the bosoncore Hamiltonian, single-particle energies and occupation probabilities of the considered odd-mass systems are completely determined by fully microscopic SCMF calculations.…”

Investigation of shape coexistence in 118–128Te isotopes

“…Shape coexistence has been observed in many mass regions throughout the nuclear chart and has become a very useful paradigm to explain the competition between the monopole part of the nuclear effective force that tends to stabilize the nucleus into a spherical shape, in and near to shell closures, and the strong correlations (pairing, quadrupole in particular) that favors the nucleus into a deformed shapes in around mid-shell regions [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The even-mass tellurium isotopes are part of this interesting region beyond the closed proton shell where the level structure has resisted detailed theoretical understanding.…”

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

“…transfer reactions in particular, very near to closed shells (the In and Sb nuclei at Z=50 but also in other mass regions, e.g. the Tl and Bi nuclei at Z=82) some low-lying extra states, so-called intruder states, have been observed with a conspicuous energy dependence on the number of free valence neutrons, hinting for 2p-2h excitations as their origin [49][50][51][52][53][54][55][56][57][58][59][60][61]. If these excitations are proton excitations combined with the neutron degree of freedom appearing on both sides of the Z=50 closed shell, such as condition which are available for Te isotopes, it is a natural step to suggest that low-lying extra 0 + excitations will also show up in the even-even nuclei in between.…”

“…Very important information about the shape-coexisting states in this region has been extracted in α-decay studies of fusion products, especially when detecting γ rays or electrons in coincidence with α particles . 3 There are two naturally complementary ways in order to describe the phenomenon of nuclear shape coexistence [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. The first one is model that starts from a nuclear shell-model approach, protons and neutrons are expected to gradually fill the various shells at Z, N = 2, 8, 20, 28, ... giving rise to a number of double-closed shell nuclei that are the reference points determining shells.…”