Shape coexistence in Ni68

Suchyta, S.; Liddick, S. N.; Tsunoda, Y.; Otsuka, T.; Bennett, M. B.; Chemey, A.; Honma, M.; Larson, N.; Prokop, C. J.; Quinn, S. J.; Shimizu, N.; Simon, A.; Spyrou, A.; Tripathi, V.; Utsuno, Y.; VonMoss, J. M.

doi:10.1103/PhysRevC.89.021301

Title: Shape coexistence in ${}^{68}{Ni}$

Abstract

The internal-conversion and internal-pair-production decays of the first excited 0⁺ state in ⁶⁸Ni are studied following the β decay of ⁶⁸Co. A novel experimental technique, in which the ions of 68 Co were implanted into a planar germanium double-sided strip detector and which required digital pulse processing, is developed. The values for the energy of the first excited 0⁺ state and the electric monopole transition strength from the first excited 0⁺ state to the ground state in ⁶⁸Ni are determined to be 1605(3) keV and 7.6 (4) × 10^-3 , respectively. Comparisons of the experimental results to Monte Carlo shell-model calculations suggest the coexistence between a spherical ground state and an oblate first excited 0⁺ state in ⁶⁸Ni.

Authors:

Suchyta, S. ^[1]; Liddick, S. N. ^[1]; Tsunoda, Y. ^[2]; Otsuka, T. ^[3]; Bennett, M. B. ^[1]; Chemey, A. ^[1]; Honma, M. ^[4]; Larson, N. ^[1]; Prokop, C. J. ^[1]; Quinn, S. J. ^[1]; Shimizu, N. ^[5]; Simon, A. ^[1]; Spyrou, A. ^[1]; Tripathi, V. ^[6]; Utsuno, Y. ^[7]; VonMoss, J. M. ^[6]

Michigan State Univ., East Lansing, MI (United States)
Univ. of Tokyo (Japan). Dept. of Physics
Michigan State Univ., East Lansing, MI (United States); Univ. of Tokyo (Japan)
Univ. of Aizu, Fukushima (Japan)
Univ. of Tokyo (Japan)
Florida State Univ., Tallahassee, FL (United States)
Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center

Publication Date:: Tue Feb 11 00:00:00 EST 2014

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States). Nuclear Science and Security Consortium

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1454854

Grant/Contract Number:: NA0000979

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C, Nuclear Physics

Additional Journal Information:: Journal Volume: 89; Journal Issue: 2; 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


                    Suchyta, S., Liddick, S. N., Tsunoda, Y., Otsuka, T., Bennett, M. B., Chemey, A., Honma, M., Larson, N., Prokop, C. J., Quinn, S. J., Shimizu, N., Simon, A., Spyrou, A., Tripathi, V., Utsuno, Y., and VonMoss, J. M. Shape coexistence in Ni68.  United States: N. p., 2014. 
Web.  doi:10.1103/PhysRevC.89.021301.

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                    Suchyta, S., Liddick, S. N., Tsunoda, Y., Otsuka, T., Bennett, M. B., Chemey, A., Honma, M., Larson, N., Prokop, C. J., Quinn, S. J., Shimizu, N., Simon, A., Spyrou, A., Tripathi, V., Utsuno, Y., & VonMoss, J. M. Shape coexistence in Ni68.  United States.  https://doi.org/10.1103/PhysRevC.89.021301

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                    Suchyta, S., Liddick, S. N., Tsunoda, Y., Otsuka, T., Bennett, M. B., Chemey, A., Honma, M., Larson, N., Prokop, C. J., Quinn, S. J., Shimizu, N., Simon, A., Spyrou, A., Tripathi, V., Utsuno, Y., and VonMoss, J. M. Tue .  
"Shape coexistence in Ni68".  United States.  https://doi.org/10.1103/PhysRevC.89.021301.  https://www.osti.gov/servlets/purl/1454854.

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@article{osti_1454854,

  title        = {Shape coexistence in Ni68},

  author       = {Suchyta, S. and Liddick, S. N. and Tsunoda, Y. and Otsuka, T. and Bennett, M. B. and Chemey, A. and Honma, M. and Larson, N. and Prokop, C. J. and Quinn, S. J. and Shimizu, N. and Simon, A. and Spyrou, A. and Tripathi, V. and Utsuno, Y. and VonMoss, J. M.},

  abstractNote = {The internal-conversion and internal-pair-production decays of the first excited 0+ state in 68Ni are studied following the β decay of 68Co. A novel experimental technique, in which the ions of 68 Co were implanted into a planar germanium double-sided strip detector and which required digital pulse processing, is developed. The values for the energy of the first excited 0+ state and the electric monopole transition strength from the first excited 0+ state to the ground state in 68Ni are determined to be 1605(3) keV and 7.6 (4) × 10-3 , respectively. Comparisons of the experimental results to Monte Carlo shell-model calculations suggest the coexistence between a spherical ground state and an oblate first excited 0+ state in 68Ni.},

  doi          = {10.1103/PhysRevC.89.021301},

  journal      = {Physical Review C, Nuclear Physics},

  number       = 2,

  volume       = 89,

  place        = {United States},

  year         = {Tue Feb 11 00:00:00 EST 2014},

  month        = {Tue Feb 11 00:00:00 EST 2014}

}

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https://doi.org/10.1103/PhysRevC.89.021301

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Figure 1: (a) Time profile of a GeDSSD detector signal for a ⁶⁸Co $\beta$ decay followed by an internal transition. (b) Energy spectra measured in the GeDSSD for events which occurred less than 2 s following the arrival of a ⁶⁸Co ion, showing signals attributed to the detection of amore »

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Occupation numbers of spherical orbits in self-consistent beyond-mean-field methods journal, May 2016

Single-particle strength in neutron-rich Cu 69 from the Zn 70 ( d , He 3 ) Cu 69 proton pick-up reaction journal, June 2016

E 0 transition strength in stable Ni isotopes journal, February 2019

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

Excitation energies in neutron-rich rare isotopes as indicators of changing shell structure journal, September 2015

Novel shape evolution in exotic Ni isotopes and configuration-dependent shell structure text, January 2013

Exact solution of the pairing problem for spherical and deformed systems text, January 2016

In-Medium Similarity Renormalization Group for Closed and Open-Shell Nuclei text, January 2016

Consolidating the concept of low-energy magnetic dipole decay radiation text, January 2018

Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculations text, January 2019

Title: Shape coexistence in ${}^{68}{Ni}$

$β$ decay of $^{66} Co,$ $^{68} Co,$ and $^{70} Co$
journal, April 2000

A triplet of differently shaped spin-zero states in the atomic nucleus 186Pb
journal, May 2000

${}_{28}^{68}N i_{40}$ : Magicity versus Superfluidity
journal, February 2002

Quadrupole Collectivity in Neutron-Rich Fe and Cr Isotopes
journal, June 2013

Enhanced Quadrupole Collectivity at $N = 40$ : The Case of Neutron-Rich Fe Isotopes
journal, January 2011

High efficiency beta-decay spectroscopy using a planar germanium double-sided strip detector
journal, November 2013

Study of even-A zirconium and strontium isotopes with the (d, 6Li) reaction
journal, October 1984

I. On the constitution of atoms and molecules
journal, July 1913

Electronic Shell Structure and Abundances of Sodium Clusters
journal, June 1984

Electric monopole transitions from low energy excitations in nuclei
journal, May 1999

Commissioning the A1900 projectile fragment separator
journal, May 2003

Interpretation of Some of the Excited States of $4 n$ Self-Conjugate Nuclei
journal, January 1956

Evaluation of theoretical conversion coefficients using BrIcc
journal, May 2008

Monte Carlo shell model for atomic nuclei
journal, January 2001

Thirty-two-fold segmented germanium detectors to identify γ-rays from intermediate-energy exotic beams
journal, July 2001

Island of inversion around ${}^{64}{Cr}$
journal, November 2010

Shape coexistence along $N = 40$
journal, December 2011

Pairing-excitation versus intruder states in ${}^{68}{Ni}$ and ${}^{90}{Zr}$
journal, August 2010

New-generation Monte Carlo shell model for the K computer era
journal, January 2012

Structure of ${}^{65, 67}{Co}$ studied through the $β$ decay of ${}^{65, 67}{Fe}$ and a deep-inelastic reaction
journal, April 2009

Shape isomerism at $N = 40$ : Discovery of a proton intruder state in ${}^{67}{Co}$
journal, October 2008

Decay of Neutron-Rich Mn Nuclides and Deformation of Heavy Fe Isotopes
journal, February 1999

Magic features of 68Ni
journal, June 1982

New $T = 1$ effective interactions for the $f_{5 ∕ 2} p_{3 ∕ 2} p_{1 ∕ 2} g_{9 ∕ 2}$ model space: Implications for valence-mirror symmetry and seniority isomers
journal, October 2004

Discovery of a new isomeric state in $^{68}$ Ni: Evidence for a highly deformed proton intruder state
journal, March 2012

Electric monopole transitions between 0+ states for nuclei throughout the periodic table
journal, January 2005

Low-energy structure of $_{27}^{66}$ Co $_{39}$ and $_{27}^{68}$ Co $_{41}$ populated through $β$ decay
journal, January 2012

Collectivity at $N = 40$ in neutron-rich ${}^{64}{Cr}$
journal, May 2010

Shape coexistence in atomic nuclei
journal, November 2011

Reevaluation of X-Ray Atomic Energy Levels
journal, January 1967

Algorithms for pulse shape analysis using silicon detectors
journal, March 2012

New effective interaction for $f_{5} {pg}_{9}$ -shell nuclei
journal, December 2009

Configuration mixing and relative transition rates between low-spin states in $^{68}$ Ni
journal, October 2013

$N = 40$ Neutron Subshell Closure in the ${}^{68}{Ni}$ Nucleus
journal, February 1995

Nuclear Spins and Moments of Ga Isotopes Reveal Sudden Structural Changes between $N = 40$ and $N = 50$
journal, June 2010

Study of even-A zirconium and strontium isotopes with the (d, 6Li) reaction
journal, August 1985

Electronic Shell Structure and Abundances of Sodium Clusters
journal, July 1984

Discovery of a new isomeric state in $^{68}$Ni: Evidence for a highly-deformed proton intruder state
text, January 2012

78Ni revealed as a doubly magic stronghold against nuclear deformation
journal, May 2019

Shape coexistence in neutron-rich nuclei
journal, January 2016

The role of shell evolution in shape coexistence
journal, January 2016

In-medium similarity renormalization group for closed and open-shell nuclei
journal, December 2016

Monte Carlo shell model studies with massively parallel supercomputers
journal, April 2017

Effects of the $γ$ -soft isomeric states on the giant monopole resonances in even-even cadmium isotopes ${}^{110, 112, 114, 116}{Cd}$
journal, November 2019

Occupation numbers of spherical orbits in self-consistent beyond-mean-field methods
journal, May 2016

Single-particle strength in neutron-rich ${}^{69}{Cu}$ from the ${}^{70}{Zn} (d, {}^{3}{He}) {}^{69}{Cu}$ proton pick-up reaction
journal, June 2016

$E 0$ transition strength in stable Ni isotopes
journal, February 2019

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

Excitation energies in neutron-rich rare isotopes as indicators of changing shell structure
journal, September 2015

Novel shape evolution in exotic Ni isotopes and configuration-dependent shell structure
text, January 2013

Exact solution of the pairing problem for spherical and deformed systems
text, January 2016

In-Medium Similarity Renormalization Group for Closed and Open-Shell Nuclei
text, January 2016

Consolidating the concept of low-energy magnetic dipole decay radiation
text, January 2018

Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculations
text, January 2019