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American Physical Society, Physical Review C, 5(82), 2010

DOI: 10.1103/physrevc.82.051304

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Structure of neutron-rich tungsten nuclei and evidence for a 10−isomer inW190

Journal article published in 2010 by G. J. Lane ORCID, G. D. Dracoulis, F. G. Kondev, R. O. Hughes, H. Watanabe, A. P. Byrne, M. P. Carpenter, C. J. Chiara, P. Chowdhury, R. V. F. Janssens, T. Lauritsen, C. J. Lister, E. A. McCutchan, D. Seweryniak, I. Stefanescu and other authors.
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Isomers in the neutron-rich nucleus 190W have been characterized. A 10- state from the 9/2-[505]⊗11/2+[615] two-neutron configuration with a 240-μs lifetime decays via a K-allowed, 97-keV, M2 transition to an 8+ state with a 160-ns lifetime from the 9/2-[505]⊗7/2-[503] neutron configuration. New states have also been identified in 188W, including a Kπ=8-, 158-ns isomer from the 9/2-[614]⊗7/2+[404] two-proton configuration. The K hindrance is observed to decrease with increasing neutron number, consistent with a trend toward increasing triaxial softness.