Deformation effects on the Gamow-Teller strength distributions in the double-β decay partners 76Ge and 76Se

A theoretical approach based on a deformed quasiparticle random phase approximation built on a Skyrme self-consistent mean field is used to describe the recent measurements of the Gamow-Teller GT - strength distribution extracted from the charge-exchange reaction 76Ge(3He ,t )76As with high energy r...

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Detalles Bibliográficos
Autor: Sarriguren, Pedro
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/67005
Acceso en línea:http://hdl.handle.net/10261/67005
Access Level:acceso abierto
Descripción
Sumario:A theoretical approach based on a deformed quasiparticle random phase approximation built on a Skyrme self-consistent mean field is used to describe the recent measurements of the Gamow-Teller GT - strength distribution extracted from the charge-exchange reaction 76Ge(3He ,t )76As with high energy resolution. The same analysis is made to describe the Gamow-Teller GT + strength distribution measured in the 76Se(d ,2He)76As reaction. Combining these two branches, the nuclear matrix element for the two-neutrino double-β decay process is evaluated and compared to experiment. The role of the nuclear deformation on those processes is emphasized and analyzed. © 2012 American Physical Society.