Signatures for shape-phase transitions in the rare-earth nuclei, in the evolution of single-particle spectra and two-particle transfer-intensities
The rare-earth Nd, Sm, Gd and Dy nuclei are well known to undergo a shape-phase transition around N - 90 from vibrational to rotational behaviour - or, correspondingly - from a spherical nuclear shape to an axial-symmetric deformed shape. This can experimentally be verified by, for example, the evol...
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57016055008 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57016055008 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas quantum phase transitions Nuclear structure models and methods |
| Sumario: | The rare-earth Nd, Sm, Gd and Dy nuclei are well known to undergo a shape-phase transition around N - 90 from vibrational to rotational behaviour - or, correspondingly - from a spherical nuclear shape to an axial-symmetric deformed shape. This can experimentally be verified by, for example, the evolution of the R4/2= E(4+1) / E (2+1) ratio, or the evolution of the quadrupole moment, Q2. Recently, the study of nuclear phase-shape transitions has gained considerable interest, since the introduction of exact algebraic solutions for the critical points of many of the different phase-shape transitions that are possible in the atomic nucleus. In this contribution, in the first part, we investigate the microscopic underlying mechanism that drives the rare-earth isotopes towards deformation, studying the evolution of their proton and neutron single-particle spectra within the Relativistic Hartree-Bogoliubov model. In the second part, within the Interacting Boson Model and the framework with boson coherent states, and in the light of renewed interest in experiments on two-particle transfer-reactions, we study the evolution of the transfer spectroscopic intensities as a possible signature of shape-phase transitions. |
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