Full-symmetry and mixed-symmetry states in even ruthenium isotopes

Giannatiempo, A.; Nannini, A.; Sona, P.; Cutoiu, D.

doi:10.1103/physrevc.52.2969

Cited by 58 publications

(29 citation statements)

References 40 publications

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“…The parameters ε, κ, χ ρ and C Lρ are the free parameters that have been determined so as to reproduce as closely as possible the excitation-energy of all positive parity levels for which a clear indication of the spin value exists, following the same procedure described in [40]. The value of χ π has been kept fixed along the isotopic chain as suggested by microscopic considerations which predict that this parameter depends only on the proton number [41].…”

Section: Resultsmentioning

confidence: 99%

IBM-2 calculations of some even-even selenium nuclei

2006

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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.

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Section: Resultsmentioning

confidence: 99%

IBM-2 calculations of some even-even selenium nuclei

2006

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“…The even isotopes of Ru have been experimentally studied in Ref. [47]. Their global properties which are relevant for the context of E (5) (27) with x=0.15, while the remaining ones are described by the Bessel functions of half integer order.…”

Section: A Hybrid Model For the U(5) To O(6) Transitional Nucleimentioning

confidence: 99%

Remarks on the shape transition from spherical to deformed gamma unstable nuclei

Râduţâ

Gheorghe

Faessler

2005

J. Phys. G: Nucl. Part. Phys.

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Energies and transition probabilities for low lying states in134 Ba and 104 Ru were calculated within a hybrid model. The ground and the first 2 + states are described alternatively as a harmonic and anharmonic vibrator states while the remaining states as states with E(5) symmetry. Results for 134 Ba are compared with those predicted by some other methods. One concludes that a gradual setting of the 'critical' potential yields a better agreement with the experimental data. Very good agreement with the data is obtained for 104 Ru. Comparing the present results with those of E(5) symmetry, it is conspicuous that the present formalism add corrections to the E(5) formalism by bringing the predictions closer to the experimental data. Analytical relationship between the states with U (5) symmetry and those given by the E(5) description is established.

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“…Many new γ-transitions have been placed in the decay scheme and several spin and/or parity have been definitely assigned. The even-even ruthenium and palladium isotopes with N≥ 54 have been analyzed in the framework of IBM-2 in [7,8]. From those analyses it became evident that, to correctly reproduce the properties of the levels, it is necessary to take into account the presence of mixed-symmetry (MS) states, i.e.…”

Section: Discussionmentioning

confidence: 99%