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Título:
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Fast-timing study of the l-forbidden 1/2(+) -> 3/2(+) M1 transition in Sn-129
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Autores:
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Fraile Prieto, Luis Mario ;
Vedia Fernández, María Victoria ;
Ibáñez García, Paula Beatriz ;
Paziy, Vadym ;
Pérez Liva, Mailyn ;
Picado, E. ;
Vidal, M.
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Tipo de documento:
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texto impreso
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Editorial:
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Amer Physical Soc, 2016-04-04
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Dimensiones:
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application/pdf
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Nota general:
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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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The levels in Sn-129 populated from the beta(-) decay of In-129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 1/2(+) state and the 3/2(+) ground state in 129Sn are expected to have configurations dominated by the neutron s(1/2) (l = 0) and d(3/2) (l = 2) single-particle states, respectively. Consequently, these states should be connected by a somewhat slow l-forbidden M1 transition. Using fast-timing spectroscopy we havemeasured the half-life of the 1/2(+) 315.3-keV state, T-1/2 = 19(10) ps, which corresponds to a moderately fast M1 transition. Shell-model calculations using the CD-Bonn effective interaction, with standard effective charges and g factors, predict a 4-ns half-life for this level. We can reconcile the shell-model calculations to the measured T-1/2 value by the renormalization of the M1 effective operator for neutron holes.
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En línea:
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https://eprints.ucm.es/id/eprint/37870/1/Fraile%20Prieto%2010%20libre.pdf
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