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High-sensitivity study of levels in Al 30 following β decay of Mg 30

AuthorsOlaizola, B.; Mach, H.; Fraile, L. M.; Benito, J.; García Borge, María José ; Tengblad, Olof ; Thirolf, P. G.; Yordanov, D. T.
Issue Date21-Nov-2016
PublisherAmerican Physical Society
CitationPhysical Review C - Nuclear Physics 94: 054318 (2016)
Abstractγ-ray and fast-timing spectroscopy were used to study levels in Al30 populated following the β- decay of Mg30. Five new transitions and three new levels were located in Al30. A search was made to identify the third 1+ state expected at an excitation energy of ∼2.5 MeV. Two new levels were found, at 3163.9 and 3362.5 keV, that are firm candidates for this state. Using the advanced time-delayed (ATD) βγγ(t) method we have measured the lifetime of the 243.8-keV state to be T1/2=15(4)ps, which implies that the 243.8-keV transition is mainly of M1 character. Its fast B(M1;2+→3+) value of 0.10(3) W.u. is in very good agreement with the USD shell-model prediction of 0.090 W.u. The 1801.5-keV level is the only level observed in this study that could be a candidate for the second excited 2+ state. Published by the American Physical Society
DescriptionB. Olaizola et al. ; 7 págs.; 5 figs.; 1 tab. ; Open Access funded by Creative Commons Atribution Licence 3.0
Publisher version (URL)https://doi.org/10.1103/PhysRevC.94.054318
Identifiersdoi: 10.1103/PhysRevC.94.054318
issn: 1089-490X
Appears in Collections:(CFMAC-IEM) Artículos
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