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Multiparticle emission in the decay of Ar 31

AutorKoldste, G.T.; Blank, B.; García Borge, María José ; Briz, José Antonio ; Carmona Gallardo, M. ; Fraile, Luis M. ; Perea, Ángel ; Tengblad, Olof ; Thomas, J.-C.; Van De Walle, J.
Fecha de publicación2014
EditorAmerican Physical Society
CitaciónPhysical Review C - Nuclear Physics 89: 064315 (2014)
ResumenA multihit capacity setup was used to study the decay of the dripline nucleus 31Ar, produced at the ISOLDE facility at CERN. A spectroscopic analysis of the β-delayed three-proton decay of 31Ar is presented for the first time together with a quantitative analysis of the β-delayed 2pγ decay. A new method for determination of the spin of low-lying levels in the βp daughter 30S using proton-proton angular correlations is presented and used to determine that the spin of the 5.2-MeV level is most likely 3+ with 4+ also possible. The half-life of 31Ar is found to be 15.1(3) ms. An improved analysis of the Fermi β strength including the β3p-decay mode gives a total measured branching ratio of 3.60(44)%, which is lower than the theoretical value found to be 4.24(43)%. Finally, a previously unidentified γ transition from the isobaric analog state in the decay of 33Ar has been found. © 2014 American Physical Society.
DescripciónG. T. Koldste et al. ; 10 pags. ; 14 figs. ; 4 tabs. ; PACS number(s): 23.40.Hc, 27.30.+t
Identificadoresdoi: 10.1103/PhysRevC.89.064315
issn: 1089-490X
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