New excitations in Ba142 and Ce144: Evolution of γ bands in the N=86 isotones

Naidja, H.; Nowacki, F.; Bounthong, B.; Czerwinski, M.; Rzaca-Urban, T.; Roginski, T.; Urban, W.; Wisniewski, J.; Sieja, K.; Smith, A. G.; Smith, J. F.; Simpson, G. S.; Ahmad, I.; Greene, J. P.

doi:10.1103/PhysRevC.95.064303

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

Abstract

New excited states in ¹⁴²Ba and ¹⁴⁴Ce are investigated by means of prompt γ-ray spectroscopy of the radiation following spontaneous fission of ²⁵²Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. Lastly, the presence of collectivity in the N = 86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei.

Authors:

Naidja, H. ^[1]; Nowacki, F. ^[2]; Bounthong, B. ^[2]; Czerwinski, M. ^[3]; Rzaca-Urban, T. ^[3]; Roginski, T. ^[3]; Urban, W. ^[3]; Wisniewski, J. ^[3]; Sieja, K. ^[2]; Smith, A. G. ^[4]; Smith, J. F. ^[4]; Simpson, G. S. ^[5]; Ahmad, I. ^[6]; Greene, J. P. ^[6]

Univ. de Strasbourg, Strasbourg (France); Univ. Constantine, Constantine (Algeria)
Univ. de Strasbourg, Strasbourg (France)
Univ. of Warsaw, Warsaw (Poland)
The Univ. of Manchester, Manchester (United Kingdom)
Institut National Polytechnique de Grenoble, Grenoble Cedex (France)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: Fri Jun 02 00:00:00 EDT 2017

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

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); Polish National Science Centre (NCN)

OSTI Identifier:: 1364617

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 95; Journal Issue: 6; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Naidja, H., Nowacki, F., Bounthong, B., Czerwinski, M., Rzaca-Urban, T., Roginski, T., Urban, W., Wisniewski, J., Sieja, K., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., and Greene, J. P. New excitations in Ba142 and Ce144: Evolution of γ bands in the N=86 isotones.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevC.95.064303.

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                    Naidja, H., Nowacki, F., Bounthong, B., Czerwinski, M., Rzaca-Urban, T., Roginski, T., Urban, W., Wisniewski, J., Sieja, K., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., & Greene, J. P. New excitations in Ba142 and Ce144: Evolution of γ bands in the N=86 isotones.  United States.  https://doi.org/10.1103/PhysRevC.95.064303

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                    Naidja, H., Nowacki, F., Bounthong, B., Czerwinski, M., Rzaca-Urban, T., Roginski, T., Urban, W., Wisniewski, J., Sieja, K., Smith, A. G., Smith, J. F., Simpson, G. S., Ahmad, I., and Greene, J. P. Fri .  
"New excitations in Ba142 and Ce144: Evolution of γ bands in the N=86 isotones".  United States.  https://doi.org/10.1103/PhysRevC.95.064303.  https://www.osti.gov/servlets/purl/1364617.

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@article{osti_1364617,

  title        = {New excitations in Ba142 and Ce144: Evolution of γ bands in the N=86 isotones},

  author       = {Naidja, H. and Nowacki, F. and Bounthong, B. and Czerwinski, M. and Rzaca-Urban, T. and Roginski, T. and Urban, W. and Wisniewski, J. and Sieja, K. and Smith, A. G. and Smith, J. F. and Simpson, G. S. and Ahmad, I. and Greene, J. P.},

  abstractNote = {New excited states in 142Ba and 144Ce are investigated by means of prompt γ-ray spectroscopy of the radiation following spontaneous fission of 252Cf. Measurements of angular correlations and the observed branchings allowed the assignment of spins and parities with confidence. The new measurements are reinforced by shell-model calculations where energy levels, electric transitions, and magnetic moments are consistent with experimental data. Lastly, the presence of collectivity in the N = 86 isotones is confirmed by clear signatures of soft triaxial γ bands in both nuclei.},

  doi          = {10.1103/PhysRevC.95.064303},

  journal      = {Physical Review C},

  number       = 6,

  volume       = 95,

  place        = {United States},

  year         = {Fri Jun 02 00:00:00 EDT 2017},

  month        = {Fri Jun 02 00:00:00 EDT 2017}

}

Copy to clipboard

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Works referencing / citing this record:

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

Coexistence of Reflection Asymmetric and Symmetric Shapes in ${}^{144}{Ba}$
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Zhu, S. J.; Wang, E. H.; Hamilton, J. H.
Physical Review Letters, Vol. 124, Issue 3
DOI: 10.1103/physrevlett.124.032501

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Title: New excitations in Ba 142 and Ce 144 : Evolution of γ bands in the N = 86 isotones

Abstract

Citation Formats

Nuclear Data Sheets for A = 142 journal, August 2011

New isomer found in Sb 89 51 140 : Sphericity and shell evolution between N = 82 and N = 90 journal, January 2016

Low-spin structure of Br 51 35 86 and Kr 50 36 86 nuclei: The role of the g 7 / 2 neutron orbital journal, October 2016

First evidence of γ collectivity close to the doubly magic core Sn 132 journal, March 2016

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

Spherical shell model description of rotational motion journal, October 1995

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

Directional correlations of gamma radiations emitted from nuclear states oriented by nuclear reactions or cryogenic methods journal, April 1973

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

Intrinsic Quadrupole Moments and Shapes of Nuclear Ground States and Excited States journal, January 1972

β -delayed γ -ray spectroscopy of non-yrast states in Te 138 near the neutron drip line journal, October 2015

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

Spectroscopic Properties and Collectivity Beyond $^{132}$Sn journal, January 2017

Octupole deformation in 142,143Ba and 144Ce: new band structures in neutron-rich Ba-isotopes journal, September 1995

The strength of octupole correlations in neutron-rich Xe isotopes journal, March 2003

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

Yrast 6 + Seniority Isomers of 136 , 138 Sn journal, September 2014

Opposite-parity bands in Eu 153 journal, March 1994

Collectivity above the Closed $^{78}$Ni and $^{132}$Sn Cores journal, January 2016

Accurate charge-dependent nucleon-nucleon potential at fourth order of chiral perturbation theory journal, October 2003

Shape phase transition at N = 88 – 90 in Ba 144 , 146 journal, May 2015

Single-particle and collective degrees of freedom in Zr 101 and Mo 103 , 105 journal, May 2006

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

Gamma rays from fission fragments journal, November 1995

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

The shell model as a unified view of nuclear structure journal, June 2005

Octupole shapes and shape changes at high spins in Ra and Th nuclei journal, June 1987

Collectivity in the light xenon isotopes: A shell model study journal, December 2010

New shell closure for neutron-rich Sn isotopes journal, June 2010

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

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

Recent Advances in the Shell Model Calculations of the Spectroscopic Properties of $^{134,136,138}$Sn journal, January 2015

Reflection asymmetric states in 146Nd journal, January 1996

Table of nuclear magnetic dipole and electric quadrupole moments journal, May 2005

Measurement of picosecond lifetimes in neutron-rich Xe isotopes journal, September 2016

Single particle states in neutron-rich Zr 101 , Mo 103 , 105 , 107 , and Ru 109 , 111 journal, July 2009

Realistic effective interactions for nuclear systems journal, October 1995

Structure of exotic nuclei around double shell closures journal, July 2007

Octupole Vibration and Influence of Shell Effects on the E 1 Transition Rates in 140 Xe journal, June 1999

Proposed s = ± 1 octupole bands in Xe 140 journal, June 2016

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

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

Nuclear structure of 96,98Mo: Shape coexistence and mixed-symmetry states journal, March 2016

Structure of neutron-rich nuclei around 132Sn journal, July 1997

New instrumentation for precise (n,γ) measurements at ILL Grenoble journal, March 2013

Band structure of 146Ce studied through γ-γ angular correlation measurements journal, March 2000

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

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

Spectroscopy of neutron-rich Te and Xe isotopes within a new shell model context journal, August 2013

Search for octupole deformation in neutron-rich Xe isotopes journal, December 1996

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

Nilsson-SU3 self-consistency in heavy N = Z nuclei journal, August 2015

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

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

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

Nuclear Data Sheets for A = 142
journal, August 2011

New isomer found in ${}_{51}^{140}{Sb}_{89}$ : Sphericity and shell evolution between $N = 82$ and $N = 90$
journal, January 2016

Low-spin structure of ${}_{35}^{86}{Br}_{51}$ and ${}_{36}^{86}{Kr}_{50}$ nuclei: The role of the $g_{7 / 2}$ neutron orbital
journal, October 2016

First evidence of $γ$ collectivity close to the doubly magic core ${}^{132}{Sn}$
journal, March 2016

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

Spherical shell model description of rotational motion
journal, October 1995

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

Directional correlations of gamma radiations emitted from nuclear states oriented by nuclear reactions or cryogenic methods
journal, April 1973

Spectroscopic properties of neutron rich nuclei beyond ¹³² Sn and seniority mixing
journal, February 2015

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

Intrinsic Quadrupole Moments and Shapes of Nuclear Ground States and Excited States
journal, January 1972

$β$ -delayed $γ$ -ray spectroscopy of non-yrast states in ${}^{138}{Te}$ near the neutron drip line
journal, October 2015

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

Spectroscopic Properties and Collectivity Beyond $^{132}$Sn
journal, January 2017

Octupole deformation in 142,143Ba and 144Ce: new band structures in neutron-rich Ba-isotopes
journal, September 1995

The strength of octupole correlations in neutron-rich Xe isotopes
journal, March 2003

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

Yrast 6 $^{+}$ Seniority Isomers of $^{136, 138}$ Sn
journal, September 2014

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

Collectivity above the Closed $^{78}$Ni and $^{132}$Sn Cores
journal, January 2016

Accurate charge-dependent nucleon-nucleon potential at fourth order of chiral perturbation theory
journal, October 2003

Shape phase transition at $N = 88 – 90$ in ${}^{144, 146}{Ba}$
journal, May 2015

Single-particle and collective degrees of freedom in ${}^{101}{Zr}$ and ${}^{103, 105}{Mo}$
journal, May 2006

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

Gamma rays from fission fragments
journal, November 1995

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

The shell model as a unified view of nuclear structure
journal, June 2005

Octupole shapes and shape changes at high spins in Ra and Th nuclei
journal, June 1987

Collectivity in the light xenon isotopes: A shell model study
journal, December 2010

New shell closure for neutron-rich Sn isotopes
journal, June 2010

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

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

Recent Advances in the Shell Model Calculations of the Spectroscopic Properties of $^{134,136,138}$Sn
journal, January 2015

Reflection asymmetric states in 146Nd
journal, January 1996

Table of nuclear magnetic dipole and electric quadrupole moments
journal, May 2005

Measurement of picosecond lifetimes in neutron-rich Xe isotopes
journal, September 2016

Single particle states in neutron-rich ${}^{101}{Zr}$ , ${}^{103, 105, 107}{Mo}$ , and ${}^{109, 111}{Ru}$
journal, July 2009

Realistic effective interactions for nuclear systems
journal, October 1995

Structure of exotic nuclei around double shell closures
journal, July 2007

Octupole Vibration and Influence of Shell Effects on the $E 1$ Transition Rates in $^{140} Xe$
journal, June 1999

Proposed $s = \pm 1$ octupole bands in ${}^{140}{Xe}$
journal, June 2016

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

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

Nuclear structure of 96,98Mo: Shape coexistence and mixed-symmetry states
journal, March 2016

Structure of neutron-rich nuclei around 132Sn
journal, July 1997

New instrumentation for precise (n,γ) measurements at ILL Grenoble
journal, March 2013

Band structure of 146Ce studied through γ-γ angular correlation measurements
journal, March 2000

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

Spectroscopy of neutron-rich Te and Xe isotopes within a new shell model context
journal, August 2013

Search for octupole deformation in neutron-rich Xe isotopes
journal, December 1996

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

Nilsson-SU3 self-consistency in heavy $N = Z$ nuclei
journal, August 2015

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

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