Ground state particle-particle correlations and double-beta decay
A self-consistent formalism for the double-beta decay of Fermi type is provided. The particle-particle channel of the two-body interaction is considered first in the mean field equations and then in the quasiparticle random phase approximation (QRPA). The resulting approach is called the QRPA with a...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2001 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/31855 |
| Acceso en línea: | http://hdl.handle.net/10261/31855 |
| Access Level: | acceso abierto |
| Palabra clave: | Double beta decay QRPA calculations |
| Sumario: | A self-consistent formalism for the double-beta decay of Fermi type is provided. The particle-particle channel of the two-body interaction is considered first in the mean field equations and then in the quasiparticle random phase approximation (QRPA). The resulting approach is called the QRPA with a self-consistent mean field (QRPASMF). The mode provided by QRPASMF does not collapse for any strength of the particle-particle interaction. The transition amplitude for double-beta decay is almost insensitive to the variation of the particle-particle interaction. Comparing it with the result of the standard pnQRPA, it is smaller by a factor of 6. The prediction for transition amplitude agrees quite well with the exact result. The present approach is the only one that produces a strong decrease of the amplitude and at the same time does not alter the stability of the ground state. |
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