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Prolate shape of Ba...
Prolate shape of Ba-140 from a first combined Doppler-shift and Coulomb-excitation measurement at the REX-ISOLDE facility
- Article/chapterEnglish2012
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2012
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electronicrdacarrier
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LIBRIS-ID:oai:lup.lub.lu.se:150356ca-04d0-475d-93b0-af9e3edc0fc3
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https://lup.lub.lu.se/record/3139142URI
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https://doi.org/10.1103/PhysRevC.86.034310DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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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 2(1)(+) state of Ba-140 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 tau(2(1)(+)) = 10.4(-0.8)(+2.2) ps the electric quadrupole moment was determined to be Q(2(1)(+)) = -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.
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Behrens, T.
(author)
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Bildstein, V.
(author)
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Blazhev, A.
(author)
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Bruyneel, B.
(author)
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Butterworth, J.
(author)
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Clement, E.
(author)
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Coquard, L.
(author)
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Egido, J. L.
(author)
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Ekström, AndreasLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)nucl-ade
(author)
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Fitzpatrick, C. R.
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Fransen, C.
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Gernhaeuser, R.
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Habs, D.
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Hess, H.
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Leske, J.
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Kroell, T.
(author)
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Kruecken, R.
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Lutter, R.
(author)
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Marley, P.
(author)
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Moeller, T.
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Otsuka, T.
(author)
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Patronis, N.
(author)
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Petts, A.
(author)
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Pietralla, N.
(author)
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Rodriguez, T. R.
(author)
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Shimizu, N.
(author)
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Stahl, C.
(author)
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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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de Walle, J. Van
(author)
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Warr, N.
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Wenander, F.
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Wiens, A.
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KärnfysikFysiska institutionen
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In:Physical Review C (Nuclear Physics)86:30556-2813
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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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show more...
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Clement, E.
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Coquard, L.
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Egido, J. L.
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Ekström, Andreas
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Fitzpatrick, C. ...
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Fransen, C.
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Gernhaeuser, R.
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Habs, D.
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Hess, H.
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Leske, J.
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Kroell, T.
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Kruecken, R.
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Lutter, R.
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Marley, P.
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Moeller, 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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Rodriguez, 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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de Walle, J. Van
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Warr, N.
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Wenander, F.
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Wiens, A.
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