Publication: Disentangling decaying isomers and searching for signatures of collective excitations in beta decay
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2020
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Iop Publishing Ltd
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Abstract
In this contribution we summarize the recent study of the beta decay of neutron-rich nuclei with isomeric states close in energy to the ground states. The disentanglement of each pair of beta-decaying states was achieved by applying different strategies and using the purification capabilities of the JYFLTRAP double Penning trap system at the Ion Guide Isotope Separator On-Line facility in Jyvaskyla. The Total Absorption gamma-ray Spectroscopy technique was employed to determine the beta intensity probabilities populating the excited states in the daughter nuclei. Previously undetected beta intensity was found and we have already evaluated the impact of part of these results on reactor summation calculations. The possibility to populate states associated with the Pygmy Dipole Resonance in the beta decay of Y-96gs has also been investigated thanks to the sensitivity of our technique to high-lying strength in the daughter nuclei.
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Artículo firmado por 44 autores. International Nuclear Physics Conference (INPC) (27th.2019.Glasgow, Scotland). This work has been supported by the CNRS challenge NEEDS and the associated NACRE project, as well as by the Spanish Ministerio de Economia y Competitividad under Grants No. FPA2011-24553, No. AIC-A-2011-0696, No. FPA2014-52823-C2-1-P, No. FPA2015-65035-P, No. FPI/BES-2014-068222, No. FPA2017-83946-C2-1-P and the program Severo Ochoa (SEV-2014-0398), by the Spanish Ministerio de Educacion under the FPU12/01527 Grant, by the European Commission under the FP7/EURATOM contract 605203 and the FP7/ENSAR contract 262010, and by the Junta para la Ampliacion de Estudios Programme (CSIC JAE-Doc contract) co-financed by ESF.