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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:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [2];  [2];  [2];  [2]; ORCiD logo [3]
  1. Michigan State Univ., East Lansing, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Michigan State Univ., East Lansing, MI (United States); Florida State Univ., Tallahassee, FL (United States)
Publication Date:
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
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. https://doi.org/10.1103/physrevlett.125.232501.
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
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.
@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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