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dc.contributor.authorGarcía Ramos, José Enrique 
dc.contributor.authorHeyde, K.
dc.identifier.citationGarcía Ramos, J.E., Heyde, K.: "Quest of shape coexistence in Zr isotopes". Physical Review C 100, 044315.
dc.identifier.issn2469-9993 (electrónico)
dc.description.abstractThe mass region with A approx 100 and Z approx 40 is known to experience a sudden onset of deformation. The presence of the subshell closure Z=40 makes feasible to create particle-hole excitations at a moderate excitation energy and, therefore, likely intruder states could be present in the low-lying spectrum. In other words, shape coexistence is expected to be a key ingredient to understand this mass region. The aim of this work is to describe excitation energies, transition rates, radii, and two-neutron separation energies for the even-even 94-110Zr nuclei and, moreover, to obtain information about wave functions and deformation. The interacting boson model with configuration mixing will be the framework to study the even-even Zr nuclei, considering only two types of configurations: 0particle-0hole and 2particle-2hole excitations. On one hand, the parameters appearing in the Hamiltonian and in the E2 transition operator are fixed trough a least-squares fit to the whole available experimental information. On the other hand, once the parameters have been fixed, the calculations allow to obtain a complete set of observables for the whole even-even Zr chain of isotopes. Spectra, transition rates, radii, rho2(E0), and two-neutron separation energies have been calculated and a good agreement with the experimental information has been obtained. Moreover, a detailed study of the wave function has been conducted and mean-field energy surfaces and deformation have been computed too. The importance of shape coexistence has been shown to correctly describe the A approx 100 mass area for even-even Zr nuclei. This work confirmed the rather spherical nature of the ground state of 94-98Zr and its deformed nature for 100-110Zr isotopes. The sudden onset of deformation in 100Zr is owing to the rapid lowering of a deformed (intruder) configuration which is high-lying in lighter isotopes.es_ES
dc.description.sponsorshipThis work was supported by the InterUniversity Attraction Poles Program of the Belgian State-Federal Office for Scientific, Technical and Cultural Affairs (IAP Grant P7/12) and it has also been partially supported by the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía (Spain) under Group FQM-370, by Centro de Estudios Avanzados en Física, Matemática y Computación of the University of Huelva, and by Instituto Carlos I de Física Teórica y Computación of the University of Granada.es_ES
dc.publisherAmerican Physical Society (postprint)es_ES
dc.relation.isversionofPublisher’s versión
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.titleQuest of shape coexistence in Zr isotopeses_ES

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