The ground-state properties of neutron-rich Nb-106 and its beta decay into Mo-106 have been studied using the CARIBU radioactive-ion-beam facility at Argonne National Laboratory. Niobium-106 ions were extracted from a Cf-252 fission source and mass separated before being delivered as low-energy beams to the Canadian Penning Trap, as well as the X-Array and SATURN beta-decay-spectroscopy station. The measured Nb-106 ground-state mass excess of -66202.0(13) keV is consistent with a recent measurement but has three times better precision; this work also rules out the existence of a second long-lived, beta-decaying state in Nb-106 above 5 keV in excitation energy. The decay half-life of Nb-106 was measured to be 1.097(21) s, which is 8% longer than the adopted value. The level scheme of the decay progeny, Mo-106,has been expanded up to approximate to 4 MeV. The distribution of decay strength and considerable population of excited states in Mo-106 of J >= 3 emphasizes the need to revise the adopted J(pi) = 1(-) ground-state spin-parity assignment of Nb-106; it is more likely to be J >= 3.
Ground-state and decay properties of neutron-rich Nb106 / A.J. Mitchell, R. Orford, G.J. Lane, C.J. Lister, P. Copp, J.A. Clark, G. Savard, J.M. Allmond, A.D. Ayangeakaa, S. Bottoni, M.P. Carpenter, P. Chowdhury, D.A. Gorelov, R.V.F. Janssens, F.G. Kondev, U. Patel, D. Seweryniak, M.L. Smith, Y.Y. Zhong, S. Zhu. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 103:2(2021 Feb 24), pp. 024323.024323-1-024323.024323-14.
|Titolo:||Ground-state and decay properties of neutron-rich Nb106|
|Settore Scientifico Disciplinare:||Settore FIS/04 - Fisica Nucleare e Subnucleare|
|Data di pubblicazione:||24-feb-2021|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevC.103.024323|
|Appare nelle tipologie:||01 - Articolo su periodico|