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Search for octupole correlations in Nd-147
Natl Ctr Nucl Res, PL-00681 Warsaw, Poland..
Natl Ctr Nucl Res, PL-00681 Warsaw, Poland..
Natl Ctr Nucl Res, PL-00681 Warsaw, Poland..
Natl Ctr Nucl Res, PL-00681 Warsaw, Poland..
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2015 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 92, no 3, 034328Article in journal (Refereed) Published
Abstract [en]

Properties of excited states in Nd-147 have been studied with the multispectra and gamma gamma coincidencemeasurements. Twenty-four new gamma lines and three new levels have been introduced into the level scheme of Nd-147. Using the advanced time-delayed beta gamma gamma(t) method, we measured lifetimes of eight excited levels in Nd-147, populated via the beta decay of Pr-147. We have determined reduced transition probabilities for 30 gamma transitions. Multidimensional potential energy surface calculations performed for Nd-147 suggest two single-quasiparticle configurations with nonzero octupole deformation, with K = 1/2 and K = 5/2. Our calculations also predict a sizable value of the electric dipole moment vertical bar D-0 vertical bar = 0.26e fm for this nucleus, while experimentally, a lower limit of vertical bar D-0 vertical bar >= 0.02e fm has been evaluated for the supposed K = 1/2 parity doublet. In contrast to the theoretical results, we do not observe the parity doublet bands with K = 5/2. This, and the lack of theoretically expected E1 strength in Nd-147,Nd-149 may signal some poorly understood structural effect in the odd-N lanthanides.

Place, publisher, year, edition, pages
2015. Vol. 92, no 3, 034328
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-265704DOI: 10.1103/PhysRevC.92.034328ISI: 000362087600001OAI: oai:DiVA.org:uu-265704DiVA: diva2:866418
Available from: 2015-11-02 Created: 2015-11-02 Last updated: 2017-12-01Bibliographically approved

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