First observation of the beta decay of neutron-rich $^{218}Bi$ by the pulsed-release technique and resonant laser ionization

The neutron-rich isotope /sup 218/Bi has been produced in proton- induced spallation of a uranium carbide target at the ISOLDE facility at CERN, extracted from the ion source by the pulsed-release technique and resonant laser ionization, and its beta decay is studied for the first time. A half-life...

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Detalles Bibliográficos
Autores principales: De Witte, H, Andreyev, A N, Borzov, I N, Caurier, E, Cederkäll, J, De Smet, A, Eckhaudt, S, Fedorov, D V, Fedosseev, V, Franchoo, S, Górska, M, Grawe, H, Huber, G, Huyse, M, Janas, Z, Köster, U, Kurcewicz, W, Kurpeta, J, Plochocki, A, Van Duppen, P, Van de Vel, K, Weissman, L
Lenguaje:eng
Publicado: 2004
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.69.044305
http://cds.cern.ch/record/779427
Descripción
Sumario:The neutron-rich isotope /sup 218/Bi has been produced in proton- induced spallation of a uranium carbide target at the ISOLDE facility at CERN, extracted from the ion source by the pulsed-release technique and resonant laser ionization, and its beta decay is studied for the first time. A half-life of 33(1)s was measured and is discussed in the self-consistent continuum-quasi particle-random- phase approximation framework that includes Gamow-Teller and first- forbidden transitions. A level scheme was constructed for /sup 218 /Po, and a deexcitation pattern of stretched E2 transitions 8/sup +/ to 6/sup +/ to 4/sup +/ to 2/sup +/ to 0/sup +/ to the ground state is suggested. Shell-model calculations based on the Kuo-Herling interaction reproduce the experimental results satisfactorily. (28 refs).

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