Parity-Doublet Structure in the $147\atop{57}$La90 nucleus

Wisniewski, J.; Urban, W.; Rzaca-Urban, T.; Smith, A. G.; Smith, J. F.; Simpson, G. S.; Ahmad, I.; Greene, J. P.

doi:10.1103/PhysRevC.96.064301

Title: Parity-Doublet Structure in the $$147\atop{57}$$La₉₀ nucleus

Abstract

Excited states in ¹⁴⁷La, populated in spontaneous fission of ²⁵²Cf have been reinvestigated by means of γ spectroscopy, using high-fold γ coincidences measured with Gammasphere array of Ge detectors. The 229.5-keV level, which has been assigned spin-parity 9/2^- in a recent evaluation, is shown to have spin-parity 11/2^-. Consequently, the ground state has spin-parity 5/2⁺. Excited levels in ¹⁴⁷La have been arranged into a parity-doublet structure, showing that at medium excitation energy the ¹⁴⁷La nucleus may have octupole deformation. In conclusion, the B(E1) rates in ¹⁴⁷La, which are factor four lower than in ¹⁴⁵La, suggest that the electric dipole moment in ¹⁴⁷La is depresses by an extra mechanism, probably connected with the population of particular neutron orbitals.

Authors:

Wisniewski, J. ^[1]; Urban, W. ^[1]; Rzaca-Urban, T. ^[1]; Smith, A. G. ^[2]; Smith, J. F. ^[2]; Simpson, G. S. ^[3]; Ahmad, I. ^[4]; Greene, J. P. ^[4]

Univ. of Warsaw, Warsaw (Poland)
The Univ. of Manchester, Manchester (United Kingdom)
IN2P3-CNRS/Univ. Grenoble Alpes, Grenoble Cedex (France)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: Fri Dec 01 00:00:00 EST 2017

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1422396

Alternate Identifier(s):: OSTI ID: 1410866

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C, Nuclear Physics

Additional Journal Information:: Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Wisniewski, J., Urban, W., Rzaca-Urban, T., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., and Greene, J. P. Parity-Doublet Structure in the $147\atop{57}$La90 nucleus.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevC.96.064301.

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                    Wisniewski, J., Urban, W., Rzaca-Urban, T., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., & Greene, J. P. Parity-Doublet Structure in the $147\atop{57}$La90 nucleus.  United States.  https://doi.org/10.1103/PhysRevC.96.064301

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                    Wisniewski, J., Urban, W., Rzaca-Urban, T., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., and Greene, J. P. Fri .  
"Parity-Doublet Structure in the $147\atop{57}$La90 nucleus".  United States.  https://doi.org/10.1103/PhysRevC.96.064301.  https://www.osti.gov/servlets/purl/1422396.

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@article{osti_1422396,

  title        = {Parity-Doublet Structure in the $147\atop{57}$La90 nucleus},

  author       = {Wisniewski, J. and Urban, W. and Rzaca-Urban, T. and Smith, A. G. and Smith, J. F. and Simpson, G. S. and Ahmad, I. and Greene, J. P.},

  abstractNote = {Excited states in 147La, populated in spontaneous fission of 252Cf have been reinvestigated by means of γ spectroscopy, using high-fold γ coincidences measured with Gammasphere array of Ge detectors. The 229.5-keV level, which has been assigned spin-parity 9/2- in a recent evaluation, is shown to have spin-parity 11/2-. Consequently, the ground state has spin-parity 5/2+. Excited levels in 147La have been arranged into a parity-doublet structure, showing that at medium excitation energy the 147La nucleus may have octupole deformation. In conclusion, the B(E1) rates in 147La, which are factor four lower than in 145La, suggest that the electric dipole moment in 147La is depresses by an extra mechanism, probably connected with the population of particular neutron orbitals.},

  doi          = {10.1103/PhysRevC.96.064301},

  journal      = {Physical Review C, Nuclear Physics},

  number       = 6,

  volume       = 96,

  place        = {United States},

  year         = {Fri Dec 01 00:00:00 EST 2017},

  month        = {Fri Dec 01 00:00:00 EST 2017}

}

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Works referencing / citing this record:

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Title: Parity-Doublet Structure in the $$147\atop{57}$$La90 nucleus

Abstract

Citation Formats

First observation of excited states in 87 Se: Collectivity and j − 1 anomaly at N = 53 journal, September 2013

Transition probability, B(E2)↑, from the ground to the first-excited 2+ state of even-even nuclides journal, January 1987

Near-yrast structure of Pr 149 journal, December 2010

Near-yrast, medium-spin structure of Xe 143 journal, June 2011

New level schemes and octupole correlations of light neutron-rich lanthanum isotopes 143,144La journal, March 2009

Study of spontaneous fission with EUROGAM: Shape transition in A~100 Sr and Zr nuclei journal, February 1997

High-spin parity doublets in the nucleus 151Pm journal, September 1990

A new region of intrinsic reflection asymmetry in nuclei around 145Ba? journal, March 1985

Search for reflection asymmetric structures in the A=145 mass region: Decays of 1.8-s Cs 143 to levels of Ba 143 and 4.1-s La 147 to levels of Ce 147 journal, December 1989

Low-energy octupole and dipole modes in nuclei journal, December 1990

Octupole correlation effects in Pm 151 journal, October 1990

A new technique for measuring g factors of excited states in fission fragments using large arrays of Ge detectors journal, March 2002

Nuclear Data Sheets for A = 147 journal, April 2009

Octupole correlations in neutron-rich 1 4 5 , 1 4 7 La nuclei: Coriolis-limit-coupling bands with aligned h 1 1 / 2 proton journal, March 1999

Unexpected 5 / 2 − spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes journal, March 2013

Opposite-parity bands in Eu 153 journal, March 1994

A new high-spin level scheme for 149Nd from a fusion-fission reaction journal, May 2006

Octupole instability induced by rotation in the nuclei 146,148Nd journal, January 1988

Gamma rays from fission fragments journal, November 1995

Neutron-proton multiplets in the odd-odd nucleus Rb 53 37 90 journal, March 2016

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

New excitations in Ba 142 and Ce 144 : Evolution of γ bands in the N = 86 isotones journal, June 2017

Yrast excitations in the neutron-rich N = 52 isotones journal, October 2013

First structure information on the exotic 149 La from the $\beta^-$ -decay of 149 Ba journal, June 2004

Parities and multipolarities of gamma rays in neutron-rich odd-mass Ba nuclei journal, August 1996

Medium-spin structure of Cs 145 journal, July 2010

Decay of Ba 143 to levels of the odd-proton N= 86 nuclide La 143 journal, July 1988

Quasiparticle spectra near the yrast line journal, September 1979

Octupole correlations in neutron rich, odd- A lanthanum nuclei journal, August 1996

High-spin octupole correlations in the N = 86, 146Nd and 148Sm nuclei journal, April 1991

Spins and parities of levels in fission fragments journal, December 1998

Direct Evidence for Octupole Deformation in Ba 146 and the Origin of Large E 1 Moment Variations in Reflection-Asymmetric Nuclei journal, April 2017

Band structure of 149 Ce journal, July 2012

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

Evaluation of theoretical conversion coefficients using BrIcc journal, May 2008

Reflection symmetry of the near-yrast excitations in 145 Ba journal, October 2012

Near-yrast structure of N = 93 neutron-rich lanthanide nuclei journal, February 2010

Near-yrast structure of the La 149 nucleus journal, September 2007

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

Neutron-proton multiplets in the nucleus Br 88 journal, July 2015

Decay of Cs 145 to levels of Ba 145 journal, September 1986

Search for octupole deformation in neutron-rich Cs nuclei journal, April 1995

Interplay of valence-shell clusters and the vibrational field in94Mo and95Mo journal, March 1974

Theory of Collective Excitations in Spherical Odd-Mass Nuclei. III: Electromagnetic Properties of the Anomalous Coupling States journal, March 1974

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Neutron single-particle energies in the 132Sn region journal, July 1999

Reinvestigation of high spin states and proposed octupole correlations in Ce 147 journal, October 2014

Microscopic Structure of a New Type of Collective Excitation in Odd-Mass Mo, Ru, I, Cs and La Isotopes journal, February 1975

The observation of vibrating pear-shapes in radon nuclei journal, June 2019

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

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

Title: Parity-Doublet Structure in the $$147\atop{57}$$La₉₀ nucleus

First observation of excited states in $^{87}$ Se: Collectivity and $j - 1$ anomaly at $N = 53$
journal, September 2013

Transition probability, B(E2)↑, from the ground to the first-excited 2+ state of even-even nuclides
journal, January 1987

Near-yrast structure of ${}^{149}\Pr$
journal, December 2010

Near-yrast, medium-spin structure of ${}^{143}{Xe}$
journal, June 2011

New level schemes and octupole correlations of light neutron-rich lanthanum isotopes 143,144La
journal, March 2009

Study of spontaneous fission with EUROGAM: Shape transition in A~100 Sr and Zr nuclei
journal, February 1997

High-spin parity doublets in the nucleus 151Pm
journal, September 1990

A new region of intrinsic reflection asymmetry in nuclei around 145Ba?
journal, March 1985

Search for reflection asymmetric structures in the A=145 mass region: Decays of 1.8-s ${}^{143}{Cs}$ to levels of ${}^{143}{Ba}$ and 4.1-s ${}^{147}{La}$ to levels of ${}^{147}{Ce}$
journal, December 1989

Low-energy octupole and dipole modes in nuclei
journal, December 1990

Octupole correlation effects in ${}^{151}{Pm}$
journal, October 1990

A new technique for measuring g factors of excited states in fission fragments using large arrays of Ge detectors
journal, March 2002

Nuclear Data Sheets for A = 147
journal, April 2009

Octupole correlations in neutron-rich $^{145, 147} La$ nuclei: Coriolis-limit-coupling bands with aligned $h_{11 / 2}$ proton
journal, March 1999

Unexpected $5 / 2^{-}$ spin of the ground state in $^{147}$ Ba: No octupole deformation in ground states of odd- $A$ Ba isotopes
journal, March 2013

Opposite-parity bands in ${}^{153}{Eu}$
journal, March 1994

A new high-spin level scheme for 149Nd from a fusion-fission reaction
journal, May 2006

Octupole instability induced by rotation in the nuclei 146,148Nd
journal, January 1988

Gamma rays from fission fragments
journal, November 1995

Neutron-proton multiplets in the odd-odd nucleus ${}_{37}^{90}{Rb}_{53}$
journal, March 2016

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

New excitations in ${}^{142}{Ba}$ and ${}^{144}{Ce}$ : Evolution of $γ$ bands in the $N = 86$ isotones
journal, June 2017

Yrast excitations in the neutron-rich $N = 52$ isotones
journal, October 2013

First structure information on the exotic 149 La from the $\beta^-$ -decay of 149 Ba
journal, June 2004

Parities and multipolarities of gamma rays in neutron-rich odd-mass Ba nuclei
journal, August 1996

Medium-spin structure of ${}^{145}{Cs}$
journal, July 2010

Decay of ${}^{143}{Ba}$ to levels of the odd-proton N= 86 nuclide ${}^{143}{La}$
journal, July 1988

Quasiparticle spectra near the yrast line
journal, September 1979

Octupole correlations in neutron rich, odd- A lanthanum nuclei
journal, August 1996

High-spin octupole correlations in the N = 86, 146Nd and 148Sm nuclei
journal, April 1991

Spins and parities of levels in fission fragments
journal, December 1998

Direct Evidence for Octupole Deformation in ${}^{146}{Ba}$ and the Origin of Large $E 1$ Moment Variations in Reflection-Asymmetric Nuclei
journal, April 2017

Band structure of $^{149}$ Ce
journal, July 2012

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

Evaluation of theoretical conversion coefficients using BrIcc
journal, May 2008

Reflection symmetry of the near-yrast excitations in $^{145}$ Ba
journal, October 2012

Near-yrast structure of $N = 93$ neutron-rich lanthanide nuclei
journal, February 2010

Near-yrast structure of the ${}^{149}{La}$ nucleus
journal, September 2007

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

Neutron-proton multiplets in the nucleus ${}^{88}{Br}$
journal, July 2015

Decay of ${}^{145}{Cs}$ to levels of ${}^{145}{Ba}$
journal, September 1986

Search for octupole deformation in neutron-rich Cs nuclei
journal, April 1995

Interplay of valence-shell clusters and the vibrational field in94Mo and95Mo
journal, March 1974

Theory of Collective Excitations in Spherical Odd-Mass Nuclei. III: Electromagnetic Properties of the Anomalous Coupling States
journal, March 1974

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

Evidence for coexistence of reflection asymmetric and symmetric shapes in 150Sm
journal, February 1987

Theory of Collective Excitations in Spherical Odd-Mass Nuclei. II: Structure of the Anomalous Coupling States with Spin
journal, February 1972

Intrinsic reflection asymmetry in atomic nuclei
journal, April 1996

Neutron single-particle energies in the 132Sn region
journal, July 1999

Reinvestigation of high spin states and proposed octupole correlations in ${}^{147}{Ce}$
journal, October 2014

Microscopic Structure of a New Type of Collective Excitation in Odd-Mass Mo, Ru, I, Cs and La Isotopes
journal, February 1975

The observation of vibrating pear-shapes in radon nuclei
journal, June 2019

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

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