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Título:
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Investigation of the Delta ?n=0 selection rule in Gamow-Teller transitions: The ?-decay of Hg-207
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Autores:
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Fraile Prieto, Luis Mario ;
Vedia Fernández, María Victoria ;
otros, ...
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2019-06-10
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física nuclear
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Tipo = Artículo
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Resumen:
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Gamow-Teller beta decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Delta n = 0 requirement plays a major role in the beta decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z = 50 (for N > 82) and Z = 82 (for N > 126). The level of forbiddenness of the Delta n = 1 nu 1g(9/2) -> pi 0g(7/2) transition has been investigated from the beta(-) decay of the ground state of Hg-207 into the single-proton-hole nucleus Tl-207 in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible gamma-ray transitions depopulating the pi 0g(7/2)(-1) state in Tl-207, an upper limit of 3.9 x 10(-3)% was obtained for the probability of this decay, corresponding to log ft > 8.8 within within a 95% confidence limit. This is the most stringent test of the Delta n = 0 selection rule to date. (C) 2019 The Authors. Published by Elsevier B.V.
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En línea:
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https://eprints.ucm.es/id/eprint/56344/1/FrailePrieto46libre%2BCC.pdf
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