Extended triaxial projected shell model approach for odd-neutron nuclei

Possible wobbling phenomenon in Xe125

“…This leads to a fragile coexistence of deformation-dependent excitation modes. In odd-mass Xe nuclei, the unique negativeparity h 11/2 neutron orbitals form the yrast rotational bands and their signature splitting features are well described by theoretical model calculations [6][7][8]. In addition, the second negative-parity rotational bands based on the h 11/2 neutron orbital (called the yrare bands) have also been observed.…”

“…Recently, the 125 Xe nucleus was investigated together with the other odd-A Xe isotopes within the framework of the triaxial projected shell model (TPSM) by Jehangir et al [8]. The calculation reproduces the energy levels of the yrast and yrare bands in the various isotopes [8].…”

Search for the origin of wobbling motion in the A≈130 region: The case of Xe131

“…Theoretical calculations successfully reproduced the S(I ) of the νh 11/2 band in several odd-A Xe-Ba isotopes [5]. Recently, a detailed theoretical investigation was carried out on [117][118][119][120][121][122][123][124][125][126][127][128][129][130][131] Xe under the framework of the extended triaxial projected shell model (TPSM) [44]. This calculation is also able to reproduce the experimental S(I ) of 131 Xe quite successfully [Fig.…”

“…11. A comparison of the experimental νh 11/2 band structure in 131 Xe with the theoretical predictions of the triaxial projected shell model (TPSM [44]) and triaxial particle rotor model (TPRM [5], present work). mixing ratio, δ TPRM = −0.69, of the corresponding I = 1 transition (17/2 − → 15/2 − ) is also found to be low.…”

Three-quasineutron γ-band in 127Xe

“…Using the TPSM approach, odd-neutron systems have been studied earlier with the model space of one-neutron and one-neutron coupled to two-proton quasiparticle states. However, in order to describe the high-spin states in 127 Xe, both neutron and proton aligning configurations need to be included in the basis space as these configurations cross the ground-state band [67]. In the present work, the extended basis space has been implemented and the complete basis space in the generalized approach is given by The constructed projected basis of equation ( 1) is then used to diagonalise the shell model Hamiltonian, consisting of the harmonic oscillator single-particle Hamiltonian and a residual two-body interaction comprising of quadrupole-quadrupole, monopole pairing and quadrupole pairing terms [69,70].…”