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  • Bauer, C. (author)

Prolate shape of Ba-140 from a first combined Doppler-shift and Coulomb-excitation measurement at the REX-ISOLDE facility

  • Article/chapterEnglish2012

Publisher, publication year, extent ...

  • 2012
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:150356ca-04d0-475d-93b0-af9e3edc0fc3
  • https://lup.lub.lu.se/record/3139142URI
  • https://doi.org/10.1103/PhysRevC.86.034310DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • 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.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Behrens, T. (author)
  • Bildstein, V. (author)
  • Blazhev, A. (author)
  • Bruyneel, B. (author)
  • Butterworth, J. (author)
  • Clement, E. (author)
  • Coquard, L. (author)
  • Egido, J. L. (author)
  • 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)
  • Fitzpatrick, C. R. (author)
  • Fransen, C. (author)
  • Gernhaeuser, R. (author)
  • Habs, D. (author)
  • Hess, H. (author)
  • Leske, J. (author)
  • Kroell, T. (author)
  • Kruecken, R. (author)
  • Lutter, R. (author)
  • Marley, P. (author)
  • Moeller, T. (author)
  • Otsuka, T. (author)
  • Patronis, N. (author)
  • Petts, A. (author)
  • Pietralla, N. (author)
  • Rodriguez, T. R. (author)
  • Shimizu, N. (author)
  • Stahl, C. (author)
  • Stefanescu, I. (author)
  • Stora, T. (author)
  • Thirolf, P. G. (author)
  • Voulot, D. (author)
  • de Walle, J. Van (author)
  • Warr, N. (author)
  • Wenander, F. (author)
  • Wiens, A. (author)
  • KärnfysikFysiska institutionen (creator_code:org_t)

Related titles

  • In:Physical Review C (Nuclear Physics)86:30556-2813

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