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Charge Radius of Neutron-Deficient Ni54 and Symmetry Energy Constraints Using the Difference in Mirror Pair Charge Radii

Journal Article · · Physical Review Letters
 [1];  [2]; ;  [3];  [3];  [3];  [3];  [4];  [5];  [3];  [4]
  1. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States); OSTI
  2. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  3. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States)
  4. Technical Univ. of Darmstadt (Germany)
  5. Florida State Univ., Tallahassee, FL (United States)
he nuclear root-mean-square charge radius of Ni54 was determined with collinear laser spectroscopy to be R( Ni54 )=3.737(3) fm . In conjunction with the known radius of the mirror nucleus Fe54 , the difference of the charge radii was extracted as Δ Rch =0.049(4) fm . Based on the correlation between Δ Rch and the slope of the symmetry energy at nuclear saturation density ( L ), we deduced 21L88 MeV . The present result is consistent with the L from the binary neutron star merger GW170817, favoring a soft neutron matter EOS, and barely consistent with the PREX-2 result within 1σ error bands. Our result indicates the neutron-skin thickness of Ca48 as 0.15–0.21 fm.
Research Organization:
Florida State Univ., Tallahassee, FL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-92ER40750
OSTI ID:
1980224
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 127; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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