Phase transitions and critical points in the rare-earth region
A systematic study of isotope chains in the rare–earth region is presented. For the chains 144−154 60Nd, 146−160 62Sm, 148−162 64Gd, and 150−166 66Dy, energy levels, E2 transition rates, and two– neutron separation energies are described by using the most general (up to two–body terms) IBM Hamiltoni...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2003 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/5466 |
| Acceso en línea: | http://hdl.handle.net/10272/5466 |
| Access Level: | acceso abierto |
| Palabra clave: | Quantum phase transitions Catastrophe theory Interacting boson model |
| Sumario: | A systematic study of isotope chains in the rare–earth region is presented. For the chains 144−154 60Nd, 146−160 62Sm, 148−162 64Gd, and 150−166 66Dy, energy levels, E2 transition rates, and two– neutron separation energies are described by using the most general (up to two–body terms) IBM Hamiltonian. For each isotope chain a general fit is performed in such a way that all parameters but one are kept fixed to describe the whole chain. In this region nuclei evolve from spherical to deformed shapes and a method based on catastrophe theory, in combination with a coherent state analysis to generate the IBM energy surfaces, is used to identify critical phase transition points. |
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