Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S

Longfellow, B.; Weisshaar, D.; Gade, A.; Brown, B. A.; Bazin, D.; Brown, K. W.; Elman, B.; Pereira, J.; Rhodes, D.; Spieker, M.

doi:10.1103/physrevlett.125.232501

Title: Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in ⁴³S

Abstract

The neutron-rich nuclei in the N=28 island of inversion have attracted considerable experimental and theoretical attention, providing great insight into the evolution of shell structure and nuclear shape in exotic nuclei. In this work, for the first time, quadrupole collectivity is assessed simultaneously on top of the 3/2- ground state and the 7/2- shape-coexisting isomer of 43S, putting the unique interpretation of shape and configuration coexistence at N=27 and 28 in the sulfur isotopic chain to the test. From an analysis of the electromagnetic transition strengths and quadrupole moments predicted within the shell model, it is shown that the onset of shape coexistence and the emergence of a simple collective structure appear suddenly in 43S with no indication of such patterns in the N=27 isotone 45Ar.

Authors:

^[1];

^[2];

^[2]; Brown, K. W. ^[2]; Elman, B. ^[2]; Pereira, J. ^[2]; Rhodes, D. ^[2];

^[3]

Michigan State Univ., East Lansing, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Michigan State Univ., East Lansing, MI (United States)
Michigan State Univ., East Lansing, MI (United States); Florida State Univ., Tallahassee, FL (United States)

Publication Date:: 2020-12-02

Research Org.:: Michigan State Univ., East Lansing, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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

OSTI Identifier:: 1733235

Alternate Identifier(s):: OSTI ID: 1755183; OSTI ID: 1755814

Report Number(s):: LLNL-JRNL-816153
Journal ID: ISSN 0031-9007; TRN: US2205155

Grant/Contract Number:: SC0020451; PHY-1102511; PHY-1565546; AC52-07NA27344; PHY-1811855; NA0003180

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 125; Journal Issue: 23; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Collective levels; Electromagnetic transitions; Nuclear spin & parity; Nuclear structure & decays; Radioactive beams; Shell model

Citation Formats


                    Longfellow, B., Weisshaar, D., Gade, A., Brown, B. A., Bazin, D., Brown, K. W., Elman, B., Pereira, J., Rhodes, D., and Spieker, M.. Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevlett.125.232501.

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                    Longfellow, B., Weisshaar, D., Gade, A., Brown, B. A., Bazin, D., Brown, K. W., Elman, B., Pereira, J., Rhodes, D., & Spieker, M.. Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S.  United States.  https://doi.org/10.1103/physrevlett.125.232501

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                    Longfellow, B., Weisshaar, D., Gade, A., Brown, B. A., Bazin, D., Brown, K. W., Elman, B., Pereira, J., Rhodes, D., and Spieker, M.. Wed .  
"Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S".  United States.  https://doi.org/10.1103/physrevlett.125.232501.  https://www.osti.gov/servlets/purl/1733235.

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@article{osti_1733235,

  title        = {Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S},

  author       = {Longfellow, B. and Weisshaar, D. and Gade, A. and Brown, B. A. and Bazin, D. and Brown, K. W. and Elman, B. and Pereira, J. and Rhodes, D. and Spieker, M.},

  abstractNote = {The neutron-rich nuclei in the N=28 island of inversion have attracted considerable experimental and theoretical attention, providing great insight into the evolution of shell structure and nuclear shape in exotic nuclei. In this work, for the first time, quadrupole collectivity is assessed simultaneously on top of the 3/2- ground state and the 7/2- shape-coexisting isomer of 43S, putting the unique interpretation of shape and configuration coexistence at N=27 and 28 in the sulfur isotopic chain to the test. From an analysis of the electromagnetic transition strengths and quadrupole moments predicted within the shell model, it is shown that the onset of shape coexistence and the emergence of a simple collective structure appear suddenly in 43S with no indication of such patterns in the N=27 isotone 45Ar.},

  doi          = {10.1103/physrevlett.125.232501},

  journal      = {Physical Review Letters},

  number       = 23,

  volume       = 125,

  place        = {United States},

  year         = {2020},

  month        = {12}

}

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Similar Records

Title: Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in 43S

Abstract

Citation Formats

Focal plane detector for the S800 high-resolution spectrometer journal, February 1999

Evolution of shell structure in exotic nuclei journal, March 2020

Coulomb excitation of odd- A neutron-rich π ( s − d ) and ν ( f − p ) shell nuclei journal, February 1999

Accuracy of B ( E 2 ; 0 1 + → 2 1 + ) transition rates from intermediate-energy Coulomb excitation experiments journal, February 2006

Shell model structure of 43 S and 44 S re-examined journal, May 2014

Quadrupole collectivity in neutron-deficient Sn nuclei: 104 Sn and the role of proton excitations journal, November 2013

Prolate, oblate, and triaxial shape coexistence, and the lost magicity of N = 28 in 43 S journal, January 2013

On Closed Shells in Nuclei. II journal, June 1949

Commissioning the A1900 projectile fragment separator journal, May 2003

Rotational and neutron-hole states in S 43 via the neutron knockout and fragmentation reactions journal, September 2009

Nuclear magic numbers: New features far from stability journal, October 2008

Collective and Single-Particle Motion in Beyond Mean Field Approaches journal, February 2016

Shape Coexistence and the N = 28 Shell Closure Far from Stability journal, May 2000

Microscopic origin of nuclear deformations journal, July 1994

Collectivity in 44S journal, March 1997

Transition to deformed shapes as a nuclear Jahn-Teller effect journal, May 1984

Isomeric Character of the Lowest Observed 4 + State in S 44 journal, January 2017

Lifetime Measurements and Triple Coexisting Band Structure in S 43 journal, July 2018

Triple configuration coexistence in S 44 journal, June 2011

The S800 spectrograph journal, May 2003

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Detailed experimental study on intermediate-energy Coulomb excitation of 46 Ar journal, July 2003

Collapse of the N = 28 Shell Closure in S 42 i journal, July 2007

Coulomb Excitation at Intermediate Energies journal, December 1998

New CsI(Na) hodoscope array for the S800 spectrograph at NSCL journal, October 2011

Merging of the islands of inversion at N = 20 and N = 28 journal, July 2014

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Shell Erosion and Shape Coexistence in S 27 16 43 journal, March 2009

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

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Shell structure of S 43 and collapse of the N = 28 shell closure journal, September 2020

On the measurement of B ( E 2, 0 + 1 → 2 + 1 ) using intermediate-energy Coulomb excitation journal, September 2007

Relativistic coulomb excitation journal, May 1979

Quadrupole collectivity beyond N = 50 in neutron-rich Se and Kr isotopes journal, October 2017

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Title: Shape Changes in the N = 28 Island of Inversion: Collective Structures Built on Configuration-Coexisting States in ⁴³S

Focal plane detector for the S800 high-resolution spectrometer
journal, February 1999

Evolution of shell structure in exotic nuclei
journal, March 2020

Coulomb excitation of odd- A neutron-rich $π (s - d)$ and $ν (f - p)$ shell nuclei
journal, February 1999

Accuracy of $B (E 2; 0_{1}^{+} \to 2_{1}^{+})$ transition rates from intermediate-energy Coulomb excitation experiments
journal, February 2006

Shell model structure of $^{43} S$ and $^{44} S$ re-examined
journal, May 2014

Quadrupole collectivity in neutron-deficient Sn nuclei: $^{104}$ Sn and the role of proton excitations
journal, November 2013

Prolate, oblate, and triaxial shape coexistence, and the lost magicity of $N = 28$ in $^{43}$ S
journal, January 2013

On Closed Shells in Nuclei. II
journal, June 1949

Commissioning the A1900 projectile fragment separator
journal, May 2003

Rotational and neutron-hole states in ${}^{43}S$ via the neutron knockout and fragmentation reactions
journal, September 2009

Nuclear magic numbers: New features far from stability
journal, October 2008

Collective and Single-Particle Motion in Beyond Mean Field Approaches
journal, February 2016

Shape Coexistence and the $N = 28$ Shell Closure Far from Stability
journal, May 2000

Microscopic origin of nuclear deformations
journal, July 1994

Collectivity in 44S
journal, March 1997

Transition to deformed shapes as a nuclear Jahn-Teller effect
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Isomeric Character of the Lowest Observed $4^{+}$ State in ${}^{44}S$
journal, January 2017

Lifetime Measurements and Triple Coexisting Band Structure in ${}^{43}S$
journal, July 2018

Triple configuration coexistence in ${}^{44}S$
journal, June 2011

The S800 spectrograph
journal, May 2003

Prolate-Spherical Shape Coexistence at $N = 28$ in ${}^{44}S$
journal, September 2010

Detailed experimental study on intermediate-energy Coulomb excitation of $^{46} Ar$
journal, July 2003

Collapse of the $N = 28$ Shell Closure in ${}^{42}S i$
journal, July 2007

Coulomb Excitation at Intermediate Energies
journal, December 1998

New CsI(Na) hodoscope array for the S800 spectrograph at NSCL
journal, October 2011

Merging of the islands of inversion at $N = 20$ and $N = 28$
journal, July 2014

Isomers, nuclear structure and spectroscopy
journal, January 2013

Shell Erosion and Shape Coexistence in ${}_{16}^{43}S_{27}$
journal, March 2009

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

Shell structure of ${}^{43}S$ and collapse of the $N = 28$ shell closure
journal, September 2020

On the measurement of B ( E 2, 0 ⁺ ₁ → 2 ⁺ ₁ ) using intermediate-energy Coulomb excitation
journal, September 2007

Relativistic coulomb excitation
journal, May 1979

Quadrupole collectivity beyond $N = 50$ in neutron-rich Se and Kr isotopes
journal, October 2017

Shape transitions in exotic Si and S isotopes and tensor-force-driven Jahn-Teller effect
journal, November 2012

IsoTagger: Identification of isomeric nuclear states produced in fragmentation reactions with radioactive beams
journal, January 2015

New effective interaction for $0 ℏ ω$ shell-model calculations in the $sd − pf$ valence space
journal, January 2009

On the "Magic Numbers" in Nuclear Structure
journal, June 1949

Review of metastable states in heavy nuclei
journal, May 2016

Is the $7 / 2_{1}^{-}$ Isomer State of ${}^{43}S$ Spherical?
journal, April 2012

Nature of Isomerism in Exotic Sulfur Isotopes
journal, January 2015

CAESAR—A high-efficiency CsI(Na) scintillator array for in-beam spectroscopy with fast rare-isotope beams
journal, December 2010