Experimental identification of the T=1 , Jπ=6+ state of Co54 and isospin symmetry in A=54 studied via one-nucleon knockout reactions

Spieker, Mark; Weisshaar, D.; Gade, A.; Brown, B. A.; Adrich, P.; Bazin, D.; Bentley, M. A.; Brown, J. R.; Campbell, C. M.; Diget, C. Aa.; Elman, B.; Glasmacher, T.; Hill, M.; Longfellow, B.; Pritychenko, Boris; Ratkiewicz, A.; Rhodes, D.; Tostevin, J. A.

doi:10.1103/PhysRevC.100.061303

Title: Experimental identification of the $T = 1$ , $J^{π} = 6^{+}$ state of ${}^{54}{Co}$ and isospin symmetry in $A = 54$ studied via one-nucleon knockout reactions

Abstract

In this paper, new experimental data obtained from γ-ray tagged one-neutron and one-proton knockout from ⁵⁵Co are presented. A candidate for the sought-after T = 1, T_z = 0, J^π = 6⁺ state in ⁵⁴Co is proposed based on a comparison to the new data on ⁵⁴Fe, the corresponding observables predicted by large-scale-shell-model (LSSM) calculations in the full fp-model space employing charge-dependent contributions, and isospin-symmetry arguments. Furthermore, possible isospin-symmetry breaking in the A = 54, T = 1 triplet is studied by calculating the experimental c coefficients of the isobaric mass multiplet equation (IMME) up to the maximum possible spin J = 6 expected for the (1f_7/2)^-2 two-hole configuration relative to the doubly magic nucleus ⁵⁶Ni. Lastly, the experimental quantities are compared to the theoretically predicted c coefficients from LSSM calculations using two-body matrix elements obtained from a realistic chiral effective field theory potential at next-to-next-to-next-to-leading order (N³LO).

Authors:

Spieker, Mark ^[1]; Weisshaar, D. ^[1]; Gade, A. ^[1]; Brown, B. A. ^[1]; Adrich, P. ^[1]; Bazin, D. ^[1]; Bentley, M. A. ^[2]; Brown, J. R. ^[2]; Campbell, C. M. ^[1]; Diget, C. Aa. ^[2]; Elman, B. ^[1]; Glasmacher, T. ^[1]; Hill, M. ^[1]; Longfellow, B. ^[1]; Pritychenko, Boris ^[3]; Ratkiewicz, A. ^[1]; Rhodes, D. ^[1]; Tostevin, J. A. ^[4]

Michigan State Univ., East Lansing, MI (United States)
Univ. of York (United Kingdom)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Univ. of Surrey, Guildford (United Kingdom)

Publication Date:: Wed Dec 11 00:00:00 EST 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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

OSTI Identifier:: 1580255

Alternate Identifier(s):: OSTI ID: 1737593

Report Number(s):: BNL-212450-2019-JAAM
Journal ID: ISSN 2469-9985; PRVCAN; TRN: US2102251

Grant/Contract Number:: SC0012704; NA0003180; AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 100; 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; Direct reactions; energy levels & level densities; nuclear reactions; nuclear structure & decays; nucleon-nucleon interactions; shell model; unstable nuclei induced nuclear reactions

Citation Formats


                    Spieker, Mark, Weisshaar, D., Gade, A., Brown, B. A., Adrich, P., Bazin, D., Bentley, M. A., Brown, J. R., Campbell, C. M., Diget, C. Aa., Elman, B., Glasmacher, T., Hill, M., Longfellow, B., Pritychenko, Boris, Ratkiewicz, A., Rhodes, D., and Tostevin, J. A. Experimental identification of the T=1 , Jπ=6+ state of Co54 and isospin symmetry in A=54 studied via one-nucleon knockout reactions.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevC.100.061303.

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                    Spieker, Mark, Weisshaar, D., Gade, A., Brown, B. A., Adrich, P., Bazin, D., Bentley, M. A., Brown, J. R., Campbell, C. M., Diget, C. Aa., Elman, B., Glasmacher, T., Hill, M., Longfellow, B., Pritychenko, Boris, Ratkiewicz, A., Rhodes, D., & Tostevin, J. A. Experimental identification of the T=1 , Jπ=6+ state of Co54 and isospin symmetry in A=54 studied via one-nucleon knockout reactions.  United States.  https://doi.org/10.1103/PhysRevC.100.061303

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                    Spieker, Mark, Weisshaar, D., Gade, A., Brown, B. A., Adrich, P., Bazin, D., Bentley, M. A., Brown, J. R., Campbell, C. M., Diget, C. Aa., Elman, B., Glasmacher, T., Hill, M., Longfellow, B., Pritychenko, Boris, Ratkiewicz, A., Rhodes, D., and Tostevin, J. A. Wed .  
"Experimental identification of the T=1 , Jπ=6+ state of Co54 and isospin symmetry in A=54 studied via one-nucleon knockout reactions".  United States.  https://doi.org/10.1103/PhysRevC.100.061303.  https://www.osti.gov/servlets/purl/1580255.

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@article{osti_1580255,

  title        = {Experimental identification of the T=1 , Jπ=6+ state of Co54 and isospin symmetry in A=54 studied via one-nucleon knockout reactions},

  author       = {Spieker, Mark and Weisshaar, D. and Gade, A. and Brown, B. A. and Adrich, P. and Bazin, D. and Bentley, M. A. and Brown, J. R. and Campbell, C. M. and Diget, C. Aa. and Elman, B. and Glasmacher, T. and Hill, M. and Longfellow, B. and Pritychenko, Boris and Ratkiewicz, A. and Rhodes, D. and Tostevin, J. A.},

  abstractNote = {In this paper, new experimental data obtained from γ-ray tagged one-neutron and one-proton knockout from 55Co are presented. A candidate for the sought-after T = 1, Tz = 0, Jπ = 6+ state in 54Co is proposed based on a comparison to the new data on 54Fe, the corresponding observables predicted by large-scale-shell-model (LSSM) calculations in the full fp-model space employing charge-dependent contributions, and isospin-symmetry arguments. Furthermore, possible isospin-symmetry breaking in the A = 54, T = 1 triplet is studied by calculating the experimental c coefficients of the isobaric mass multiplet equation (IMME) up to the maximum possible spin J = 6 expected for the (1f7/2)-2 two-hole configuration relative to the doubly magic nucleus 56Ni. Lastly, the experimental quantities are compared to the theoretically predicted c coefficients from LSSM calculations using two-body matrix elements obtained from a realistic chiral effective field theory potential at next-to-next-to-next-to-leading order (N3LO).},

  doi          = {10.1103/PhysRevC.100.061303},

  journal      = {Physical Review C},

  number       = 6,

  volume       = 100,

  place        = {United States},

  year         = {Wed Dec 11 00:00:00 EST 2019},

  month        = {Wed Dec 11 00:00:00 EST 2019}

}

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Title: Experimental identification of the T = 1 , Jπ = 6+ state of Co 54 and isospin symmetry in A = 54 studied via one-nucleon knockout reactions

Abstract

Citation Formats

Coulomb energy differences between high-spin states in isobaric multiplets journal, October 2007

�ber den Bau der Atomkerne. I journal, January 1932

Reduction of spectroscopic strength: Weakly-bound and strongly-bound single-particle states studied using one-nucleon knockout reactions journal, April 2008

On the Consequences of the Symmetry of the Nuclear Hamiltonian on the Spectroscopy of Nuclei journal, January 1937

The Shell-Model Code NuShellX@MSU journal, June 2014

One-proton and one-neutron knockout reactions from N = Z = 28 Ni 56 to the A = 55 mirror pair Co 55 and Ni 55 journal, May 2019

Isospin and deformation studies in the odd-odd N = Z nucleus Co 54 journal, November 2010

Single-particle structure of silicon isotopes approaching Si 42 journal, September 2014

Effective interaction for pf -shell nuclei journal, May 2002

Commissioning the A1900 projectile fragment separator journal, May 2003

Single-particle structure at N = 29 : The structure of Ar 47 and first spectroscopy of S 45 journal, May 2016

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

The role of isospin symmetry in collective nuclear structure journal, May 2006

The AME2016 atomic mass evaluation (II). Tables, graphs and references journal, March 2017

The empirical (1f 7/2 ) n model journal, December 1978

Single-nucleon knockout reactions at fragmentation beam energies journal, February 2001

New effective interaction for p f -shell nuclei and its implications for the stability of the N = Z = 28 closed core journal, March 2004

The S800 spectrograph journal, May 2003

Isobaric Multiplet Yrast Energies and Isospin Nonconserving Forces journal, September 2002

Isospin-breaking interactions studied through mirror energy differences journal, August 2015

Isospin-symmetry breaking corrections for the description of triplet energy differences journal, November 2018

D IRECT R EACTIONS WITH E XOTIC N UCLEI journal, December 2003

Observation of Ni 54 : Cross-Conjugate Symmetry in f 7 / 2 Mirror Energy Differences journal, October 2006

Low spin structure of the N = Z odd-odd nucleus 27 54 Co 27 journal, March 2000

In-beam nuclear spectroscopy of bound states with fast exotic ion beams journal, January 2008

NSCL and FRIB at Michigan State University: Nuclear science at the limits of stability journal, April 2016

Systematics of intermediate-energy single-nucleon removal cross sections journal, November 2014

Empirical isospin-nonconserving hamiltonians for shell-model calculations journal, January 1989

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Nuclear Data Sheets for A = 54 journal, September 2014

Low spin structure of odd–odd N=Z nuclei 54Co and 50Mn journal, June 2002

Realistic calculations for c coefficients of the isobaric mass multiplet equation in 1 p 0 f shell nuclei journal, August 2017

Title: Experimental identification of the $T = 1$ , $J^{π} = 6^{+}$ state of ${}^{54}{Co}$ and isospin symmetry in $A = 54$ studied via one-nucleon knockout reactions

Coulomb energy differences between high-spin states in isobaric multiplets
journal, October 2007

�ber den Bau der Atomkerne. I
journal, January 1932

Reduction of spectroscopic strength: Weakly-bound and strongly-bound single-particle states studied using one-nucleon knockout reactions
journal, April 2008

On the Consequences of the Symmetry of the Nuclear Hamiltonian on the Spectroscopy of Nuclei
journal, January 1937

The Shell-Model Code NuShellX@MSU
journal, June 2014

One-proton and one-neutron knockout reactions from $N = Z = 28 {}^{56}{Ni}$ to the $A = 55$ mirror pair ${}^{55}{Co}$ and ${}^{55}{Ni}$
journal, May 2019

Isospin and deformation studies in the odd-odd $N = Z$ nucleus ${}^{54}{Co}$
journal, November 2010

Single-particle structure of silicon isotopes approaching ${}^{42}{Si}$
journal, September 2014

Effective interaction for $pf$ -shell nuclei
journal, May 2002

Commissioning the A1900 projectile fragment separator
journal, May 2003

Single-particle structure at $N = 29$ : The structure of ${}^{47}{Ar}$ and first spectroscopy of ${}^{45}S$
journal, May 2016

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

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The AME2016 atomic mass evaluation (II). Tables, graphs and references
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journal, March 2004

The S800 spectrograph
journal, May 2003

Isobaric Multiplet Yrast Energies and Isospin Nonconserving Forces
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Isospin-breaking interactions studied through mirror energy differences
journal, August 2015

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journal, November 2018

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journal, December 2003

Observation of ${}^{54}{Ni}$ : Cross-Conjugate Symmetry in $f_{7 / 2}$ Mirror Energy Differences
journal, October 2006

Low spin structure of the $N = Z$ odd-odd nucleus $_{27}^{54} {Co}_{27}$
journal, March 2000

In-beam nuclear spectroscopy of bound states with fast exotic ion beams
journal, January 2008

NSCL and FRIB at Michigan State University: Nuclear science at the limits of stability
journal, April 2016

Systematics of intermediate-energy single-nucleon removal cross sections
journal, November 2014

Empirical isospin-nonconserving hamiltonians for shell-model calculations
journal, January 1989

Shell-model description of neutron-rich pf-shell nuclei with a new effective interaction GXPF 1
journal, April 2005

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journal, September 2014

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journal, June 2002

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journal, August 2017