Search for shape-coexisting 0(+) states in Ni-66 from lifetime measurements



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Olaizola, B. and Fraile Prieto, Luis Mario and Mach, H. and Cal González, J. and Picado, E. and Udías Moinelo, José Manuel and Otros, ... (2017) Search for shape-coexisting 0(+) states in Ni-66 from lifetime measurements. Physical review C, 95 (6). ISSN 2469-9985

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The lifetime of the 0(3)(+) state in Ni-66, two neutrons below the N = 40 subshell gap, has been measured. The transition B(E2; 0(3)(+) -> 2(1)(+)) is one of the most hindered E2 transitions in the Ni isotopic chain and it implies that, unlike Ni-68, there is a spherical structure at low excitation energy. We have performed extensive shell-model calculations that correctly predict this result, obtaining a spherical 0(+) state at the correct energy and with an extremely low B(E2; 0(3)(+)-> 2(1)(+)) value.

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© 2017 American Physical Society
Artículo firmado por más de 10 autores
This work was partially supported by the Spanish MINECO through projects FPA2013-41267-P, FPA201457196, FPA2015-65035-P, and the NuPNET network FATIMA (PRI-PIMNUP-2011-1338). The support by the European Union Seventh Framework through ENSAR (Contract No. 262010) is acknowledged. Fast timing electronics were provided by the Fast Timing Collaboration and MASTICON. B.O. acknowledges funding by the CPAN project (CSD-2007-00042@ Ingenio 2010). A.A. and S.R.L. acknowledge funding by the US National Science Foundation under Contract No. PHY-07-58100. J.A.B. acknowledges funding by the Spanish MINECO through Project FPA2012-32443. A.P. is partly funded by Programme "Centros de Excelencia Severo Ochoa" (SEV-2012-0249).

Uncontrolled Keywords:Neutron rich nuclei; Decay; Rates.
Subjects:Sciences > Physics > Nuclear physics
ID Code:44751
Deposited On:25 Sep 2017 07:48
Last Modified:10 Dec 2018 14:57

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