Direct evidence of octupole deformation in neutron-rich 144Ba

Bucher, B.; Zhu, S.; Wu, C. Y.; Janssens, R. V. F.; Cline, D.; Hayes, A. B.; Albers, M.; Ayangeakaa, A. D.; Butler, P. A.; Campbell, C. M.; Carpenter, M. P.; Chiara, C. J.; Clark, J.; Crawford, H. L.; Cromaz, M.; David, H. M.; Gregor, E. T.; Kondev, F. G.; Harker, J.; Hoffman, C. R.; Kay, B. P.; Korichi, A.; Lauritsen, T.; Macchiavelli, A. O.; Pardo, R. C.; Richard, A.; Riley, M. A.; Savard, G.; Scheck, M.; Seweryniak, D.; Smith, M. K.; Wiens, A.; Vondrasek, R.

doi:10.1103/PhysRevLett.116.112503

Title: Direct evidence of octupole deformation in neutron-rich ¹⁴⁴Ba

Abstract

©=0.65(+17-23) eb3/2, corresponds to a reduced B(E3) transition probability of 48(+25-34) W.u. This result represents an unambiguous determination of the octupole collectivity, is larger than any available theoretical prediction, and is consistent with octupole deformation. © 2016 American Physical Society. The neutron-rich nucleus Ba144 (t1/2=11.5 s) is expected to exhibit some of the strongest octupole correlations among nuclei with mass numbers A less than 200. Until now, indirect evidence for such strong correlations has been inferred from observations such as enhanced E1 transitions and interleaving positive- and negative-parity levels in the ground-state band. In this experiment, the octupole strength was measured directly by sub-barrier, multistep Coulomb excitation of a post-accelerated 650-MeV Ba144 beam on a 1.0-mg/cm2 Pb208 target. The measured value of the matrix element, 31-M(E3)01+

Authors:

Bucher, B. ^[1]; Zhu, S. ^[2]; Wu, C. Y. ^[1]; Janssens, R. V. F. ^[2]; Cline, D. ^[3]; Hayes, A. B. ^[3]; Albers, M. ^[2]; Ayangeakaa, A. D. ^[2]; Butler, P. A. ^[4]; Campbell, C. M. ^[5]; Carpenter, M. P. ^[2]; Chiara, C. J. ^[6]; Clark, J. ^[2]; Crawford, H. L. ^[7]; Cromaz, M. ^[5]; David, H. M. ^[2]; Gregor, E. T. ^[8]; Kondev, F. G. ^[2]; Harker, J. ^[6]; Hoffman, C. R. ^[2] more »

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Rochester, Rochester, NY (United States)
Univ. of Liverpool, Liverpool (United Kingdom)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
Ohio Univ., Athens, OH (United States)
Univ. of West of Scotland, Paisley (United Kingdom); Scottish Univ. Physics Alliance, Glasgow (United Kingdom)
Argonne National Lab. (ANL), Argonne, IL (United States); IN2P3-CNRS, Orsay Campus (France)
Florida State Univ., Tallahassee, FL (United States)
Univ. of the West of Scotland, Paisley (United Kingdom); Scottish Univ., Physics Alliance, Glasgow (United Kingdom)
Univ. of Notre Dame, Notre Dame, IN (United States)

Publication Date:: Thu Mar 17 00:00:00 EDT 2016

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science - Office of Nuclear Physics; National Science Foundation (NSF)

OSTI Identifier:: 1260475

Alternate Identifier(s):: OSTI ID: 1242331; OSTI ID: 1379235; OSTI ID: 1392459

Report Number(s):: LLNL-JRNL-676868
Journal ID: ISSN 0031-9007; PRLTAO

Grant/Contract Number:: AC52-07NA27344; AC02-06CH11357; AC02-05CH11231; FG02-94ER40834

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 116; Journal Issue: 11; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 22 GENERAL STUDIES OF NUCLEAR REACTORS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Bucher, B., Zhu, S., Wu, C. Y., Janssens, R. V. F., Cline, D., Hayes, A. B., Albers, M., Ayangeakaa, A. D., Butler, P. A., Campbell, C. M., Carpenter, M. P., Chiara, C. J., Clark, J., Crawford, H. L., Cromaz, M., David, H. M., Gregor, E. T., Kondev, F. G., Harker, J., Hoffman, C. R., Kay, B. P., Korichi, A., Lauritsen, T., Macchiavelli, A. O., Pardo, R. C., Richard, A., Riley, M. A., Savard, G., Scheck, M., Seweryniak, D., Smith, M. K., Wiens, A., and Vondrasek, R. Direct evidence of octupole deformation in neutron-rich 144Ba.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevLett.116.112503.

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                    Bucher, B., Zhu, S., Wu, C. Y., Janssens, R. V. F., Cline, D., Hayes, A. B., Albers, M., Ayangeakaa, A. D., Butler, P. A., Campbell, C. M., Carpenter, M. P., Chiara, C. J., Clark, J., Crawford, H. L., Cromaz, M., David, H. M., Gregor, E. T., Kondev, F. G., Harker, J., Hoffman, C. R., Kay, B. P., Korichi, A., Lauritsen, T., Macchiavelli, A. O., Pardo, R. C., Richard, A., Riley, M. A., Savard, G., Scheck, M., Seweryniak, D., Smith, M. K., Wiens, A., & Vondrasek, R. Direct evidence of octupole deformation in neutron-rich 144Ba.  United States.  https://doi.org/10.1103/PhysRevLett.116.112503

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                    Bucher, B., Zhu, S., Wu, C. Y., Janssens, R. V. F., Cline, D., Hayes, A. B., Albers, M., Ayangeakaa, A. D., Butler, P. A., Campbell, C. M., Carpenter, M. P., Chiara, C. J., Clark, J., Crawford, H. L., Cromaz, M., David, H. M., Gregor, E. T., Kondev, F. G., Harker, J., Hoffman, C. R., Kay, B. P., Korichi, A., Lauritsen, T., Macchiavelli, A. O., Pardo, R. C., Richard, A., Riley, M. A., Savard, G., Scheck, M., Seweryniak, D., Smith, M. K., Wiens, A., and Vondrasek, R. Thu .  
"Direct evidence of octupole deformation in neutron-rich 144Ba".  United States.  https://doi.org/10.1103/PhysRevLett.116.112503.  https://www.osti.gov/servlets/purl/1260475.

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@article{osti_1260475,

  title        = {Direct evidence of octupole deformation in neutron-rich 144Ba},

  author       = {Bucher, B. and Zhu, S. and Wu, C. Y. and Janssens, R. V. F. and Cline, D. and Hayes, A. B. and Albers, M. and Ayangeakaa, A. D. and Butler, P. A. and Campbell, C. M. and Carpenter, M. P. and Chiara, C. J. and Clark, J. and Crawford, H. L. and Cromaz, M. and David, H. M. and Gregor, E. T. and Kondev, F. G. and Harker, J. and Hoffman, C. R. and Kay, B. P. and Korichi, A. and Lauritsen, T. and Macchiavelli, A. O. and Pardo, R. C. and Richard, A. and Riley, M. A. and Savard, G. and Scheck, M. and Seweryniak, D. and Smith, M. K. and Wiens, A. and Vondrasek, R.},

  abstractNote = {©=0.65(+17-23) eb3/2, corresponds to a reduced B(E3) transition probability of 48(+25-34) W.u. This result represents an unambiguous determination of the octupole collectivity, is larger than any available theoretical prediction, and is consistent with octupole deformation. © 2016 American Physical Society. The neutron-rich nucleus Ba144 (t1/2=11.5 s) is expected to exhibit some of the strongest octupole correlations among nuclei with mass numbers A less than 200. Until now, indirect evidence for such strong correlations has been inferred from observations such as enhanced E1 transitions and interleaving positive- and negative-parity levels in the ground-state band. In this experiment, the octupole strength was measured directly by sub-barrier, multistep Coulomb excitation of a post-accelerated 650-MeV Ba144 beam on a 1.0-mg/cm2 Pb208 target. The measured value of the matrix element, 31-M(E3)01+},

  doi          = {10.1103/PhysRevLett.116.112503},

  journal      = {Physical Review Letters},

  number       = 11,

  volume       = 116,

  place        = {United States},

  year         = {Thu Mar 17 00:00:00 EDT 2016},

  month        = {Thu Mar 17 00:00:00 EDT 2016}

}

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Works referenced in this record:

Parity-projected calculations on octupole deformed nuclei
journal, March 1991

Egido, J. L.; Robledo, L. M.
Nuclear Physics A, Vol. 524, Issue 1
DOI: 10.1016/0375-9474(91)90016-Y

Analysis of octupole instability in medium-mass and heavy nuclei
journal, November 1984

Nazarewicz, W.; Olanders, P.; Ragnarsson, I.
Nuclear Physics A, Vol. 429, Issue 2
DOI: 10.1016/0375-9474(84)90208-2

Coulomb excitation of 226Ra
journal, May 1993

Wollersheim, H. J.; Emling, H.; Grein, H.
Nuclear Physics A, Vol. 556, Issue 2
DOI: 10.1016/0375-9474(93)90351-W

Experimental data on ground- and excited-state properties for all nuclei with mass number A=144 have been compiled and evaluated. States populated in radioactive decay as well as in nuclear reactions have been considered. For these nuclei, level and decay schemes have been built, as well as tables of nuclear properties. This work supersedes the 1989 evaluation by J.K. Tuli (1989Tu02). Manuscripts published before December 2000 have been included in this work
journal, July 2001

Sonzogni, Aa
Nuclear Data Sheets, Vol. 93, Issue 3
DOI: 10.1006/ndsh.2001.0015

Influence of shell effects and stable octupole deformation on the E 1 and E 2 transition rates in the heavy-Ba region
journal, June 1990

Mach, H.; Nazarewicz, W.; Kusnezov, D.
Physical Review C, Vol. 41, Issue 6
DOI: 10.1103/PhysRevC.41.R2469

Octupole deformation properties of the Barcelona-Catania-Paris energy density functionals
journal, March 2010

Robledo, L. M.; Baldo, M.; Schuck, P.
Physical Review C, Vol. 81, Issue 3
DOI: 10.1103/PhysRevC.81.034315

E2 transitions between positive- and negative-parity states of the ground-state alternating-parity bands
journal, September 2005

Shneidman, T. M.; Jolos, R. V.; Krücken, R.
The European Physical Journal A, Vol. 25, Issue 3
DOI: 10.1140/epja/i2005-10134-y

Microscopic description of octupole shape-phase transitions in light actinide and rare-earth nuclei
journal, February 2014

Nomura, K.; Vretenar, D.; Nikšić, T.
Physical Review C, Vol. 89, Issue 2
DOI: 10.1103/PhysRevC.89.024312

Ground-state shapes and spectroscopic properties of Z ∼ 58, N ∼ 88 nuclei
journal, May 1989

Cwiok, Stefan; Nazarewicz, Witold
Nuclear Physics A, Vol. 496, Issue 2
DOI: 10.1016/0375-9474(89)90180-2

A self-consistent approach to the ground state and lowest-lying negative-parity state in the barium isotopes
journal, November 1990

Egido, J. L.; Robledo, L. M.
Nuclear Physics A, Vol. 518, Issue 3
DOI: 10.1016/0375-9474(90)90141-8

Nuclear Data Sheets for A = 134
journal, September 2004

Sonzogni, A. A.
Nuclear Data Sheets, Vol. 103, Issue 1
DOI: 10.1016/j.nds.2004.11.001

Nuclear Ground-State Masses and Deformations
journal, March 1995

Moller, P.; Nix, J. R.; Myers, W. D.
Atomic Data and Nuclear Data Tables, Vol. 59, Issue 2, p. 185-381
DOI: 10.1006/adnd.1995.1002

Spontaneous symmetry breaking in rotating nuclei
journal, June 2001

Frauendorf, Stefan
Reviews of Modern Physics, Vol. 73, Issue 2
DOI: 10.1103/RevModPhys.73.463

Octupole deformation in neutron-rich barium isotopes
journal, December 1986

Phillips, W. R.; Ahmad, I.; Emling, H.
Physical Review Letters, Vol. 57, Issue 26
DOI: 10.1103/PhysRevLett.57.3257

Radioactive beams from gas catchers: The CARIBU facility
journal, October 2008

Savard, G.; Baker, S.; Davids, C.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 19-20
DOI: 10.1016/j.nimb.2008.05.091

CHICO, a heavy ion detector for Gammasphere
journal, September 2000

Simon, M. W.; Cline, D.; Wu, C. Y.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 452, Issue 1-2
DOI: 10.1016/S0168-9002(00)00429-0

Electromagnetic transition strengths in soft deformed nuclei
journal, November 2012

Robledo, L. M.; Bertsch, G. F.
Physical Review C, Vol. 86, Issue 5
DOI: 10.1103/PhysRevC.86.054306

Reflection-asymmetric rotor model of odd A∼ 219 – 229 nuclei
journal, June 1988

Leander, G. A.; Chen, Y. S.
Physical Review C, Vol. 37, Issue 6
DOI: 10.1103/PhysRevC.37.2744

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA
journal, May 2013

Paschalis, S.; Lee, I. Y.; Macchiavelli, A. O.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 709
DOI: 10.1016/j.nima.2013.01.009

The CARIBU Facility
conference, June 2015

Savard, Guy; Levand, Anthony; Pardo, Richard
Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)
DOI: 10.7566/JPSCP.6.010008

Lifetimes of excited states in octupole-collective ${}^{142, 144}{Ba}$ nuclei
journal, January 2005

Biswas, D. C.; Smith, A. G.; Wall, R. M.
Physical Review C, Vol. 71, Issue 1
DOI: 10.1103/PhysRevC.71.011301

Studies of pear-shaped nuclei using accelerated radioactive beams
journal, May 2013

Gaffney, L. P.; Butler, P. A.; Scheck, M.
Nature, Vol. 497, Issue 7448
DOI: 10.1038/nature12073

Octupole correlations in neutron-rich, even-even barium isotopes
journal, January 1997

Urban, W.; Jones, M. A.; Durell, J. L.
Nuclear Physics A, Vol. 613, Issue 1-2
DOI: 10.1016/S0375-9474(96)00393-4

Evolution of ground-state quadrupole and octupole stiffnesses in even-even barium isotopes
journal, August 2015

Wang, Hua-Lei; Yang, Jie; Liu, Min-Liang
Physical Review C, Vol. 92, Issue 2
DOI: 10.1103/PhysRevC.92.024303

Study of the potential energy of “octupole”-deformed nuclei in a multidimensional deformation space
journal, August 1988

Sobiczewski, Adam; Patyk, Zygmunt; Cwiok, Stefan
Nuclear Physics A, Vol. 485, Issue 1
DOI: 10.1016/0375-9474(88)90519-2

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach
journal, August 2010

Wei, Zhang; Zhi-Pan, Li; Shuang-Quan, Zhang
Chinese Physics C, Vol. 34, Issue 8
DOI: 10.1088/1674-1137/34/8/011

Intrinsic reflection asymmetry in atomic nuclei
journal, April 1996

Butler, P. A.; Nazarewicz, W.
Reviews of Modern Physics, Vol. 68, Issue 2
DOI: 10.1103/RevModPhys.68.349

Quadrupole and octupole collectivity in 148Nd
journal, June 1997

Ibbotson, R. W.; White, C. A.; Czosnyka, T.
Nuclear Physics A, Vol. 619, Issue 1-2
DOI: 10.1016/S0375-9474(97)00145-0

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach
text, January 2010

Zhang, W.; Li, Z. P.; Zhang, S. Q.
arXiv
DOI: 10.48550/arxiv.1008.1888

Electromagnetic transition strengths in soft deformed nuclei
text, January 2012

Robledo, L. M.; Bertsch, G. F.
arXiv
DOI: 10.48550/arxiv.1206.7042

Microscopic description of octupole shape-phase transitions in light actinides and rare-earth nuclei
text, January 2014

Nomura, K.; Vretenar, D.; Niksic, T.
arXiv
DOI: 10.48550/arxiv.1402.6102

Nuclear Ground-State Masses and Deformations
text, January 1993

Möller, P.; Nix, J. R.; Myers, W. D.
arXiv
DOI: 10.48550/arxiv.nucl-th/9308022

Works referencing / citing this record:

Impact of pear-shaped fission fragments on mass-asymmetric fission in actinides
journal, December 2018

Scamps, Guillaume; Simenel, Cédric
Nature, Vol. 564, Issue 7736
DOI: 10.1038/s41586-018-0780-0

Multidimensionally constrained covariant density functional theories—nuclear shapes and potential energy surfaces
journal, May 2016

Zhou, Shan-Gui
Physica Scripta, Vol. 91, Issue 6
DOI: 10.1088/0031-8949/91/6/063008

Octupole collectivity in nuclei
journal, June 2016

Butler, P. A.
Journal of Physics G: Nuclear and Particle Physics, Vol. 43, Issue 7
DOI: 10.1088/0954-3899/43/7/073002

Mean field and beyond description of nuclear structure with the Gogny force: a review
journal, December 2018

Robledo, L. M.; Rodríguez, T. R.; Rodríguez-Guzmán, R. R.
Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 1
DOI: 10.1088/1361-6471/aadebd

Analytical description of shape transition in nuclear alternating parity bands
journal, November 2018

Mardyban, E. V.; Shneidman, T. M.; Kolganova, E. A.
Chinese Physics C, Vol. 42, Issue 12
DOI: 10.1088/1674-1137/42/12/124104

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
journal, October 2019

Sun, W.; Quan, S.; Li, Z. P.
Physical Review C, Vol. 100, Issue 4
DOI: 10.1103/physrevc.100.044319

Search for octupole-deformed actinium isotopes using resonance ionization spectroscopy
journal, October 2019

Verstraelen, E.; Teigelhöfer, A.; Ryssens, W.
Physical Review C, Vol. 100, Issue 4
DOI: 10.1103/physrevc.100.044321

Parity-doublet structure in the ${}_{57}^{147}{La}_{90}$ nucleus
journal, December 2017

Wiśniewski, J.; Urban, W.; Rząca-Urban, T.
Physical Review C, Vol. 96, Issue 6
DOI: 10.1103/physrevc.96.064301

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes
journal, February 2018

Nomura, K.; Nikšić, T.; Vretenar, D.
Physical Review C, Vol. 97, Issue 2
DOI: 10.1103/physrevc.97.024317

Odd-even parity splittings and octupole correlations in neutron-rich Ba isotopes
journal, February 2018

Fu, Y.; Wang, H.; Wang, L. -J.
Physical Review C, Vol. 97, Issue 2
DOI: 10.1103/physrevc.97.024338

High-resolution $(p, t)$ study of low-spin states in ${}^{240}{Pu}$ : Octupole excitations, $α$ clustering, and other structure features
journal, June 2018

Spieker, M.; Pascu, S.; Bucurescu, D.
Physical Review C, Vol. 97, Issue 6
DOI: 10.1103/physrevc.97.064319

Coexistence of Reflection Asymmetric and Symmetric Shapes in ${}^{144}{Ba}$
journal, January 2020

Zhu, S. J.; Wang, E. H.; Hamilton, J. H.
Physical Review Letters, Vol. 124, Issue 3
DOI: 10.1103/physrevlett.124.032501

Two questions about a non-flat nuclear space-time
journal, February 2018

Albertini, Gianni; Bassani, Domenico; Cardone, Fabio
The European Physical Journal Plus, Vol. 133, Issue 2
DOI: 10.1140/epjp/i2018-11871-9

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes
text, January 2017

Nomura, K.; Nikšić, T.; Vretenar, D.
arXiv
DOI: 10.48550/arxiv.1711.09587

Mean field and beyond description of nuclear structure with the Gogny force: A review
text, January 2018

Robledo, L. M.; Rodríguez, T. R.; Rodríguez-Guzmán, R. R.
arXiv
DOI: 10.48550/arxiv.1807.02518

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
text, January 2019

Sun, W.; Quan, S.; Li, Z. P.
arXiv
DOI: 10.48550/arxiv.1911.02422

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Title: Direct evidence of octupole deformation in neutron-rich 144Ba

Abstract

Citation Formats

Parity-projected calculations on octupole deformed nuclei journal, March 1991

Analysis of octupole instability in medium-mass and heavy nuclei journal, November 1984

Coulomb excitation of 226Ra journal, May 1993

Influence of shell effects and stable octupole deformation on the E 1 and E 2 transition rates in the heavy-Ba region journal, June 1990

Octupole deformation properties of the Barcelona-Catania-Paris energy density functionals journal, March 2010

E2 transitions between positive- and negative-parity states of the ground-state alternating-parity bands journal, September 2005

Microscopic description of octupole shape-phase transitions in light actinide and rare-earth nuclei journal, February 2014

Ground-state shapes and spectroscopic properties of Z ∼ 58, N ∼ 88 nuclei journal, May 1989

A self-consistent approach to the ground state and lowest-lying negative-parity state in the barium isotopes journal, November 1990

Nuclear Data Sheets for A = 134 journal, September 2004

Nuclear Ground-State Masses and Deformations journal, March 1995

Spontaneous symmetry breaking in rotating nuclei journal, June 2001

Octupole deformation in neutron-rich barium isotopes journal, December 1986

Radioactive beams from gas catchers: The CARIBU facility journal, October 2008

CHICO, a heavy ion detector for Gammasphere journal, September 2000

Electromagnetic transition strengths in soft deformed nuclei journal, November 2012

Reflection-asymmetric rotor model of odd A∼ 219 – 229 nuclei journal, June 1988

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA journal, May 2013

The CARIBU Facility conference, June 2015

Lifetimes of excited states in octupole-collective Ba 142 , 144 nuclei journal, January 2005

Studies of pear-shaped nuclei using accelerated radioactive beams journal, May 2013

Octupole correlations in neutron-rich, even-even barium isotopes journal, January 1997

Evolution of ground-state quadrupole and octupole stiffnesses in even-even barium isotopes journal, August 2015

Study of the potential energy of “octupole”-deformed nuclei in a multidimensional deformation space journal, August 1988

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach journal, August 2010

Intrinsic reflection asymmetry in atomic nuclei journal, April 1996

Quadrupole and octupole collectivity in 148Nd journal, June 1997

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach text, January 2010

Electromagnetic transition strengths in soft deformed nuclei text, January 2012

Microscopic description of octupole shape-phase transitions in light actinides and rare-earth nuclei text, January 2014

Nuclear Ground-State Masses and Deformations text, January 1993

Impact of pear-shaped fission fragments on mass-asymmetric fission in actinides journal, December 2018

Multidimensionally constrained covariant density functional theories—nuclear shapes and potential energy surfaces journal, May 2016

Octupole collectivity in nuclei journal, June 2016

Mean field and beyond description of nuclear structure with the Gogny force: a review journal, December 2018

Analytical description of shape transition in nuclear alternating parity bands journal, November 2018

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations journal, October 2019

Search for octupole-deformed actinium isotopes using resonance ionization spectroscopy journal, October 2019

Parity-doublet structure in the La 90 57 147 nucleus journal, December 2017

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes journal, February 2018

Odd-even parity splittings and octupole correlations in neutron-rich Ba isotopes journal, February 2018

High-resolution ( p , t ) study of low-spin states in Pu 240 : Octupole excitations, α clustering, and other structure features journal, June 2018

Coexistence of Reflection Asymmetric and Symmetric Shapes in Ba 144 journal, January 2020

Two questions about a non-flat nuclear space-time journal, February 2018

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes text, January 2017

Mean field and beyond description of nuclear structure with the Gogny force: A review text, January 2018

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations text, January 2019

Title: Direct evidence of octupole deformation in neutron-rich ¹⁴⁴Ba

Parity-projected calculations on octupole deformed nuclei
journal, March 1991

Analysis of octupole instability in medium-mass and heavy nuclei
journal, November 1984

Coulomb excitation of 226Ra
journal, May 1993

Influence of shell effects and stable octupole deformation on the E 1 and E 2 transition rates in the heavy-Ba region
journal, June 1990

Octupole deformation properties of the Barcelona-Catania-Paris energy density functionals
journal, March 2010

E2 transitions between positive- and negative-parity states of the ground-state alternating-parity bands
journal, September 2005

Microscopic description of octupole shape-phase transitions in light actinide and rare-earth nuclei
journal, February 2014

Ground-state shapes and spectroscopic properties of Z ∼ 58, N ∼ 88 nuclei
journal, May 1989

A self-consistent approach to the ground state and lowest-lying negative-parity state in the barium isotopes
journal, November 1990

Nuclear Data Sheets for A = 134
journal, September 2004

Nuclear Ground-State Masses and Deformations
journal, March 1995

Spontaneous symmetry breaking in rotating nuclei
journal, June 2001

Octupole deformation in neutron-rich barium isotopes
journal, December 1986

Radioactive beams from gas catchers: The CARIBU facility
journal, October 2008

CHICO, a heavy ion detector for Gammasphere
journal, September 2000

Electromagnetic transition strengths in soft deformed nuclei
journal, November 2012

Reflection-asymmetric rotor model of odd A∼ 219 – 229 nuclei
journal, June 1988

The performance of the Gamma-Ray Energy Tracking In-beam Nuclear Array GRETINA
journal, May 2013

The CARIBU Facility
conference, June 2015

Lifetimes of excited states in octupole-collective ${}^{142, 144}{Ba}$ nuclei
journal, January 2005

Studies of pear-shaped nuclei using accelerated radioactive beams
journal, May 2013

Octupole correlations in neutron-rich, even-even barium isotopes
journal, January 1997

Evolution of ground-state quadrupole and octupole stiffnesses in even-even barium isotopes
journal, August 2015

Study of the potential energy of “octupole”-deformed nuclei in a multidimensional deformation space
journal, August 1988

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach
journal, August 2010

Intrinsic reflection asymmetry in atomic nuclei
journal, April 1996

Quadrupole and octupole collectivity in 148Nd
journal, June 1997

Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach
text, January 2010

Electromagnetic transition strengths in soft deformed nuclei
text, January 2012

Microscopic description of octupole shape-phase transitions in light actinides and rare-earth nuclei
text, January 2014

Nuclear Ground-State Masses and Deformations
text, January 1993

Impact of pear-shaped fission fragments on mass-asymmetric fission in actinides
journal, December 2018

Multidimensionally constrained covariant density functional theories—nuclear shapes and potential energy surfaces
journal, May 2016

Octupole collectivity in nuclei
journal, June 2016

Mean field and beyond description of nuclear structure with the Gogny force: a review
journal, December 2018

Analytical description of shape transition in nuclear alternating parity bands
journal, November 2018

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
journal, October 2019

Search for octupole-deformed actinium isotopes using resonance ionization spectroscopy
journal, October 2019

Parity-doublet structure in the ${}_{57}^{147}{La}_{90}$ nucleus
journal, December 2017

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes
journal, February 2018

Odd-even parity splittings and octupole correlations in neutron-rich Ba isotopes
journal, February 2018

High-resolution $(p, t)$ study of low-spin states in ${}^{240}{Pu}$ : Octupole excitations, $α$ clustering, and other structure features
journal, June 2018

Coexistence of Reflection Asymmetric and Symmetric Shapes in ${}^{144}{Ba}$
journal, January 2020

Two questions about a non-flat nuclear space-time
journal, February 2018

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes
text, January 2017

Mean field and beyond description of nuclear structure with the Gogny force: A review
text, January 2018

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
text, January 2019