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

Abstract

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.

Authors:

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)

Publication Date:: Wed Apr 12 00:00:00 EDT 2017

Research Org.:: 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 Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1353152

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

Report Number(s):: LLNL-JRNL-716436; INL/JOU-17-40819
Journal ID: ISSN 0031-9007; PRLTAO

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

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 118; Journal Issue: 15; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; barium; CARIBU; CHICO2; Coulomb excitation; dipole; E3 transitions; GRETINA; octupole

Citation Formats


                    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., and Vondrasek, R. Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevLett.118.152504.

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                    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. Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei.  United States.  https://doi.org/10.1103/PhysRevLett.118.152504

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                    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., and Vondrasek, R. Wed .  
"Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei".  United States.  https://doi.org/10.1103/PhysRevLett.118.152504.  https://www.osti.gov/servlets/purl/1353152.

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@article{osti_1353152,

  title        = {Direct evidence for octupole deformation in Ba146 and the origin of large E1 moment variations in reflection-asymmetric nuclei},

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

  abstractNote = {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.},

  doi          = {10.1103/PhysRevLett.118.152504},

  journal      = {Physical Review Letters},

  number       = 15,

  volume       = 118,

  place        = {United States},

  year         = {Wed Apr 12 00:00:00 EDT 2017},

  month        = {Wed Apr 12 00:00:00 EDT 2017}

}

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Similar Records

Title: Direct evidence for octupole deformation in Ba 146 and the origin of large E1 moment variations in reflection-asymmetric nuclei

Abstract

Citation Formats

Nuclear Data Sheets for A = 146 journal, October 1997

Octupole collectivity in nuclei journal, June 2016

Coulomb excitation of 226Ra journal, May 1993

Microscopic analysis of collective dynamics in low energy fission journal, October 1984

The neutron-rich barium isotopes journal, October 1980

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

Octupole Shapes in Nuclei journal, December 1993

Droplet-model electric dipole moments journal, March 1986

An interpretation of backbending in terms of the crossing of the ground state band with an aligned two-quasiparticle band journal, January 1979

Heart-shaped nuclei: Condensation of rotational-aligned octupole phonons journal, February 2008

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

Octupole correlations in the Ba 144 nucleus described with symmetry-conserving configuration-mixing calculations journal, June 2016

Enhanced T -odd, P -odd electromagnetic moments in reflection asymmetric nuclei journal, September 1997

CHICO2, a two-dimensional pixelated parallel-plate avalanche counter journal, April 2016

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

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

γ -soft Ba 146 and the role of nonaxial shapes at N ≈ 90 journal, January 2016

Electric dipole moment associated with octupole vibrations of a spheroidal nucleus journal, August 1957

Are the E1 transitions from octupole vibrational states collective or particle transitions? journal, October 1979

Atomic electric dipole moments: The Schiff theorem and its corrections journal, September 2007

Octupole shapes and shape changes at high spins in the Z ≊58, N ≊88 nuclei journal, May 1992

Conditions for the occurrence of backbending in the cranking model journal, February 1978

Intrinsic dipole moments in reflection-asymmetric nuclei journal, October 1991

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

Microscopic study of the octupole degree of freedom in the radium and thorium isotopes with gogny forces journal, March 1989

A systematic study of the octupole correlations in the lanthanides with realistic forces journal, August 1992

Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond journal, July 2013

Collective T - and P -Odd Electromagnetic Moments in Nuclei with Octupole Deformations journal, June 1996

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

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

Direct Evidence of Octupole Deformation in Neutron-Rich Ba 144 journal, March 2016

Low-energy collective E1 mode in nuclei journal, May 1986

Nuclear Data Sheets for A = 146 journal, September 2016

Electric-dipole transitions in deformed rare-earth nuclei journal, August 1989

Intrinsic reflection asymmetry in atomic nuclei journal, April 1996

Are the E1 transitions from octupole vibrational states collective or particle transitions? journal, January 1980

Electric dipole moment associated with octupole vibrations of a spheroidal nucleus journal, January 1958

Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond text, January 2013

Enhanced T-odd P-odd Electromagnetic Moments in Reflection Asymmetric Nuclei text, January 1996

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

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

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations 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

Towards an extended Gogny force: History, state of the art and perspectives journal, October 2017

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

Nuclear Data Sheets for A = 146
journal, October 1997

Octupole collectivity in nuclei
journal, June 2016

Coulomb excitation of 226Ra
journal, May 1993

Microscopic analysis of collective dynamics in low energy fission
journal, October 1984

The neutron-rich barium isotopes
journal, October 1980

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

Octupole Shapes in Nuclei
journal, December 1993

Droplet-model electric dipole moments
journal, March 1986

An interpretation of backbending in terms of the crossing of the ground state band with an aligned two-quasiparticle band
journal, January 1979

Heart-shaped nuclei: Condensation of rotational-aligned octupole phonons
journal, February 2008

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

Octupole correlations in the ${}^{144}{Ba}$ nucleus described with symmetry-conserving configuration-mixing calculations
journal, June 2016

Enhanced $T$ -odd, $P$ -odd electromagnetic moments in reflection asymmetric nuclei
journal, September 1997

CHICO2, a two-dimensional pixelated parallel-plate avalanche counter
journal, April 2016

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

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

$γ$ -soft ${}^{146}{Ba}$ and the role of nonaxial shapes at $N \approx 90$
journal, January 2016

Electric dipole moment associated with octupole vibrations of a spheroidal nucleus
journal, August 1957

Are the E1 transitions from octupole vibrational states collective or particle transitions?
journal, October 1979

Atomic electric dipole moments: The Schiff theorem and its corrections
journal, September 2007

Octupole shapes and shape changes at high spins in the Z ≊58, N ≊88 nuclei
journal, May 1992

Conditions for the occurrence of backbending in the cranking model
journal, February 1978

Intrinsic dipole moments in reflection-asymmetric nuclei
journal, October 1991

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

Microscopic study of the octupole degree of freedom in the radium and thorium isotopes with gogny forces
journal, March 1989

A systematic study of the octupole correlations in the lanthanides with realistic forces
journal, August 1992

Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond
journal, July 2013

Collective T - and P -Odd Electromagnetic Moments in Nuclei with Octupole Deformations
journal, June 1996

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

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

Direct Evidence of Octupole Deformation in Neutron-Rich ${}^{144}{Ba}$
journal, March 2016

Low-energy collective E1 mode in nuclei
journal, May 1986

Nuclear Data Sheets for A = 146
journal, September 2016

Electric-dipole transitions in deformed rare-earth nuclei
journal, August 1989

Intrinsic reflection asymmetry in atomic nuclei
journal, April 1996

Are the E1 transitions from octupole vibrational states collective or particle transitions?
journal, January 1980

Electric dipole moment associated with octupole vibrations of a spheroidal nucleus
journal, January 1958

Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond
text, January 2013

Enhanced T-odd P-odd Electromagnetic Moments in Reflection Asymmetric Nuclei
text, January 1996

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

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

Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
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

Towards an extended Gogny force: History, state of the art and perspectives
journal, October 2017

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