IBM-2 calculations of some even-even selenium nuclei

Abstract

Abstract:In this study, we determined the most appropriate Hamiltonian that is needed for present calculations of nuclei in the A ∼ = 80 region by the view of interacting boson model (IBM-2). Using the best-fitted values of parameters in the Hamiltonian, we have calculated energy levels and B(E2) values for a number of transitions in some doubly even Se nuclei. The results were compared with the previous experimental and theoretical data and it is observed that they are in good agreement. The calculations have been extended to Se isotopes with A < 76 for which some B(E2) values are still not known.

The Investigation of 130,132Te by IBM-2

“…2 ) and R 7 = B(E2;4  1 2  1 )/ B(E2;2  2 2  1 ) and the calculated ratios are compared with that of SU(5),O(6),SU(3) ratio limits [35] in Table 4. The similar calculations for the quantities in this table are also made in some previous works like [36] (for 70-82 Se), [37] (for 122-134 Xe ) and [38] (for 128-140 Nd).…”

E(5) Behaviour of the Ge Isotopes

“…As it was also described in [8,9], most of the shell-model studies of nuclei with Z, N≤50 assume a 88 38 Sr inert core and restrict the valence-proton particles or neutron holes to the p 1/2 and g 9/2 orbital [10]. In principle, the inclusion of these orbital will also make the model space adequate in principle to describe nuclei with Z≤38 as well as to possibly account for the high spin states that have recently been established in the Zr isotopes.…”

Untitled

“…Kr are typical examples of isotopes that exhibit a smooth phase transition from vibrational nuclei SU(5) to soft triaxial rotors O(6) ( Turkan et al, in 2006). …”