Prolate shape of 140Ba from a first combined Doppler-shift and Coulomb-excitation measurement at the REX-ISOLDE facility
Author
Bauer, C.; Behrens, T.; Bildstein, V.; Blazhev, A.; Bruyneel, B.; Butterworth, J.; Clément, E.; Coquard, L.; Egido de los Ríos, José Luis; Ekström, A.; Fitzpatrick, C. R.; Fransen, C.; Gernhäuser, R.; Habs, D.; Hess, H.; Leske, J.; Kröll, T.; Krücken, R.; Lutter, R.; Marley, P.; Möller, T.; Otsuka, T.; Patronis, N.; Petts, A.; Pietralla, N.; Rodríguez, T. R.; Shimizu, N.; Stahl, C.; Stefanescu, I.; Stora, T.; Thirolf, P. G.; Voulot, D.; Van De Walle, J.; Warr, N.; Wenander, F.; Wiens, A.Entity
UAM. Departamento de Física TeóricaPublisher
American Physical SocietyDate
2012-09-07Citation
10.1103/PhysRevC.86.034310
Physics review C 86.3 (2012): 034310
ISSN
0556-2813 (print); 1089-490X (online)DOI
10.1103/PhysRevC.86.034310Funded by
This experiment was supported by the BMBF (06DA9036I, 06DA9041I, 06DA7046, 06MT238, 06MT9156, 06ML234, 06KY205I, 06KY9136I), RII3-EURONS (Contract No. 506065), HIC for FAIR, Grants-in-Aid for Young Scientists (20740127) from JSPS, the SPIRE Field 5 from MEXT (Japan), and the MINIBALL and ISOLDE CollaborationsEditor's Version
http://dx.doi.org/ 10.1103/PhysRevC.86.034310Subjects
FísicaRights
© 2012 American Physical SocietyAbstract
Background: Quadrupole moments of excited nuclear states are important observables for geometrically interpreting nuclear structure in terms of deformed shapes, although data are scarce and sometimes ambiguous, in particular, in neutron-rich nuclides. Purpose: A measurement was performed for determining the spectroscopic quadrupole moment of the 21+ state of 140Ba in order to clarify the character of quadrupole deformation (prolate or oblate) of the state in its yrast sequence of levels. Method: We have utilized a new combined technique of lifetime measurement at REX-ISOLDE and MINIBALL using the Doppler-shift attenuation method (DSAM) and a reorientation analysis of Coulomb-excitation yields. Results: On the basis of the new lifetime of τ(21+)=10.4-0.8+2.2 ps the electric quadrupole moment was determined to be Q(21+)=-0.52(34) eb, indicating a predominant prolate deformation. Conclusions: This finding is in agreement with beyond-mean-field calculations using the Gogny D1S force and with results from the Monte Carlo shell-model approach
Files in this item
Google Scholar:Bauer, C.
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Behrens, T.
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Bildstein, V.
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Blazhev, A.
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Bruyneel, B.
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Butterworth, J.
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Clément, E.
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Coquard, L.
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Egido de los Ríos, José Luis
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Ekström, A.
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Fitzpatrick, C. R.
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Fransen, C.
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Gernhäuser, R.
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Habs, D.
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Hess, H.
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Leske, J.
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Kröll, T.
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Krücken, R.
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Lutter, R.
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Marley, P.
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Möller, T.
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Otsuka, T.
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Patronis, N.
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Petts, A.
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Pietralla, N.
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Rodríguez, T. R.
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Shimizu, N.
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Stahl, C.
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Stefanescu, I.
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Stora, T.
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Thirolf, P. G.
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Voulot, D.
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Van De Walle, J.
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Warr, N.
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Wenander, F.
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Wiens, A.
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