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Boutami, R.; García Raffi, Luis M.; Martínez Pérez, Trinitario; Rubio Barroso, Berta; Taín Enríquez, José Luis | |||
Aquest document és un/a article, creat/da en: 2008 | |||
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The low-energy structure of 231Ac has been investigated by means of gamma ray spectroscopy following the beta-decay of 231Ra. Multipolarities of 28 transitions have been established by measuring conversion electrons with a mini-orange electron spectrometer. The decay scheme of 231Ra --> 231Ac has been constructed for the first time. The Advanced Time Delayed beta-gamma-gamma(t) method has been used to measure the half-lives of five levels. The moderately fast B(E1) transition rates derived suggest that the octupole effects, albeit weak, are still present in this exotic nucleus. | |||
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