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| Format: | Artículo científico |
| Language: | en |
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Sociedad Mexicana de Física A.C.
2008
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| Online Access: | https://www.redalyc.org/articulo.oa?id=57016055008 |
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Table of Contents:
- Signatures for shape-phase transitions in the rare-earth nuclei, in the evolution of single-particle spectra and two-particle transfer-intensities R. Fossion Física, Astronomía y Matemáticas quantum phase transitions Nuclear structure models and methods 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. 2008 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57016055008 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.3 Vol.54