Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei

Bucher, B.; Zhu, S.; Wu, C. Y.; Janssens, R. V. F.; Bernard, R. N.; Robledo, L. M.; Rodríguez, T. R.; Cline, D.; Hayes, A. B.; Ayangeakaa, A. D.; Buckner, M. Q.; Campbell, C. M.; Carpenter, M. P.; Clark, J. A.; Crawford, H. L.; David, H. M.; Dickerson, C.; Harker, J.; Hoffman, C. R.; Kay, B. P.; Kondev, F. G.; Lauritsen, T.; Macchiavelli, A. O.; Pardo, R. C.; Savard, G.; Seweryniak, D.; Vondrasek, R.

doi:10.1103/PhysRevLett.118.152504

Title: Direct evidence for octupole deformation in ${}^{146}{Ba}$ and the origin of large $E 1$ moment variations in reflection-asymmetric nuclei

Journal Article · Wed Apr 12 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.152504· OSTI ID:1353152

Bucher, B. ^[1]; Zhu, S. ^[2]; Wu, C. Y. ^[3]; Janssens, R. V. F. ^[2]; Bernard, R. N. ^[4]; Robledo, L. M. ^[4]; Rodríguez, T. R. ^[4]; Cline, D. ^[5]; Hayes, A. B. ^[5]; Ayangeakaa, A. D. ^[2]; Buckner, M. Q. ^[3]; Campbell, C. M. ^[6]; Carpenter, M. P. ^[2]; Clark, J. A. ^[2]; Crawford, H. L. ^[6]; David, H. M. ^[7]; Dickerson, C. ^[2]; Harker, J. ^[8]; Hoffman, C. R. ^[2]; Kay, B. P. ^[2] more »

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. Autonoma de Madrid, Madrid (Spain)
Univ. of Rochester, Rochester, NY (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)

Despite the more than one order of magnitude difference between the measured dipole moments in ¹⁴⁴Ba and ¹⁴⁶Ba, the strength of the octupole correlations in ¹⁴⁶Ba have been determined to be as strong as that in ¹⁴⁴Ba with a similar value of B(E3; 3^- → 0⁺) ( 48 W.u.). The new results not only establish unambiguously the presence of a region of octupole deformation centered on these neutron-rich Ba isotopes, but also manifest the dependence of the electric dipole moments on the occupancy of different neutron orbitals in nuclei with enhanced octupole strength, as revealed by fully microscopic calculations.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; AC02-06CH11357; AC07-05ID14517; AC02-05CH11231

OSTI ID:: 1353152

Alternate ID(s):: OSTI ID: 1351698; OSTI ID: 1365825; OSTI ID: 1372268; OSTI ID: 1379808

Report Number(s):: LLNL-JRNL-716436; INL/JOU-17-40819; PRLTAO

Journal Information:: Physical Review Letters, Vol. 118, Issue 15; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 60 works

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References (40)

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Impact of pear-shaped fission fragments on mass-asymmetric fission in actinides Scamps, Guillaume; Simenel, Cédric Nature, Vol. 564, Issue 7736 https://doi.org/10.1038/s41586-018-0780-0	journal	December 2018
Mean field and beyond description of nuclear structure with the Gogny force: a review Robledo, L. M.; Rodríguez, T. R.; Rodríguez-Guzmán, R. R. Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 1 https://doi.org/10.1088/1361-6471/aadebd	journal	December 2018
Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations Sun, W.; Quan, S.; Li, Z. P. Physical Review C, Vol. 100, Issue 4 https://doi.org/10.1103/physrevc.100.044319	journal	October 2019
Parity-doublet structure in the ${}_{57}^{147}{La}_{90}$ nucleus Wiśniewski, J.; Urban, W.; Rząca-Urban, T. Physical Review C, Vol. 96, Issue 6 https://doi.org/10.1103/physrevc.96.064301	journal	December 2017
Signatures of octupole correlations in neutron-rich odd-mass barium isotopes Nomura, K.; Nikšić, T.; Vretenar, D. Physical Review C, Vol. 97, Issue 2 https://doi.org/10.1103/physrevc.97.024317	journal	February 2018
Odd-even parity splittings and octupole correlations in neutron-rich Ba isotopes Fu, Y.; Wang, H.; Wang, L. -J. Physical Review C, Vol. 97, Issue 2 https://doi.org/10.1103/physrevc.97.024338	journal	February 2018
High-resolution $(p, t)$ study of low-spin states in ${}^{240}{Pu}$ : Octupole excitations, $α$ clustering, and other structure features Spieker, M.; Pascu, S.; Bucurescu, D. Physical Review C, Vol. 97, Issue 6 https://doi.org/10.1103/physrevc.97.064319	journal	June 2018
Coexistence of Reflection Asymmetric and Symmetric Shapes in ${}^{144}{Ba}$ Zhu, S. J.; Wang, E. H.; Hamilton, J. H. Physical Review Letters, Vol. 124, Issue 3 https://doi.org/10.1103/physrevlett.124.032501	journal	January 2020
Towards an extended Gogny force: History, state of the art and perspectives Pillet, N.; Hilaire, S. The European Physical Journal A, Vol. 53, Issue 10 https://doi.org/10.1140/epja/i2017-12369-3	journal	October 2017
Signatures of octupole correlations in neutron-rich odd-mass barium isotopes Nomura, K.; Nikšić, T.; Vretenar, D. arXiv https://doi.org/10.48550/arxiv.1711.09587	text	January 2017
Mean field and beyond description of nuclear structure with the Gogny force: A review Robledo, L. M.; Rodríguez, T. R.; Rodríguez-Guzmán, R. R. arXiv https://doi.org/10.48550/arxiv.1807.02518	text	January 2018
Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations Sun, W.; Quan, S.; Li, Z. P. arXiv https://doi.org/10.48550/arxiv.1911.02422	text	January 2019

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Title: Direct evidence for octupole deformation in Ba 146 and the origin of large E 1 moment variations in reflection-asymmetric nuclei

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Title: Direct evidence for octupole deformation in ${}^{146}{Ba}$ and the origin of large $E 1$ moment variations in reflection-asymmetric nuclei