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Identification of the J(pi)=1(-) state in Ra-218 populated via alpha decay of Th-222
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2016 (English)In: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 94, no 1, 014307Article in journal (Refereed) Published
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Abstract [en]

The alpha decay of Th-222 populating the low-lying J(pi) = 3(-) state, and also a proposed 1(-) state, in Ra-218 has been observed. The observations suggest an excitation energy of 853 keV for the 1(-) state, which is 60 keV above the 3(-) state. The hindrance factors of these alpha decays give a possible boundary to the region of ground-state octupole deformation in the light-actinide nuclei. The relative positions of the J(pi) = 1(-) and 3(-) states suggest they are produced by an octupole-vibrational mechanism, as opposed to alpha clustering or rotations of a reflection-asymmetric octupole-deformed shape.

Place, publisher, year, edition, pages
2016. Vol. 94, no 1, 014307
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-190489DOI: 10.1103/PhysRevC.94.014307ISI: 000379506500001Scopus ID: 2-s2.0-84978208750OAI: oai:DiVA.org:kth-190489DiVA: diva2:954059
Funder
EU, FP7, Seventh Framework Programme, 262010
Note

QC 20160819

Available from: 2016-08-19 Created: 2016-08-12 Last updated: 2016-08-19Bibliographically approved

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