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Title: Charge radii of neutron deficient Fe 52 , 53 produced by projectile fragmentation

Bunched-beam collinear laser spectroscopy is performed on neutron deficient 52,53Fe prepared through in-flight separation followed by a gas stopping. This novel scheme is a major step to reach nuclides far from the stability line in laser spectroscopy. Differential mean-square charge radii δ$$\langle$$r 2$$\rangle$$ of 52,53Fe are determined relative to stable 56Fe as δ$$\langle$$r2$$\rangle$$ 56,52=$-$0.034(13) fm 2 and δ$$\langle$$r 2$$\rangle$$56,53=$-$0.218(13) fm 2, respectively, from the isotope shift of atomic hyperfine structures. The multiconfiguration Dirac-Fock method is used to calculate atomic factors to deduce δ$$\langle$$r 2$$\rangle$$. The values of δ$$\langle$$r 2$$\rangle$$ exhibit a minimum at the N=28 neutron shell closure. The nuclear density functional theory with Fayans and Skyrme energy density functionals is used to interpret the data. As a result, the trend of δ$$\langle$$r 2$$\rangle$$ along the Fe isotopic chain results from an interplay between single-particle shell structure, pairing, and polarization effects and provides important data for understanding the intricate trend in the δ$$\langle$$r 2$$\rangle$$ of closed-shell Ca isotopes
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [4] ;  [5] ;  [2] ;  [1] ;  [1] ;  [6] ;  [7] ;  [2] ;  [1] ;  [8] ;  [9] ;  [10] ;  [1] ;  [11]
  1. Michigan State Univ., East Lansing, MI (United States)
  2. Technische Univ. Darmstadt, Darmstadt (Germany)
  3. Helmholtz-Institut Jena, Jena (Germany); Friedrich-Schiller-Univ. Jena, Jena (Germany)
  4. Augustana College, Sioux Falls, SD (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Argonne National Lab. (ANL), Lemont, IL (United States)
  7. Michigan State Univ., East Lansing, MI (United States); Univ. of Warsaw, Warsaw (Poland)
  8. TRIUMF, Vancouver, BC (Canada)
  9. Univ. Erlangen, Erlangen (Germany)
  10. National Research Centre "Kurchatov Institute," Moscow (Russia); National Research Nuclear Univ. MEPhl, Moscow (Russia)
  11. National Research Centre "Kurchatov Institute," Moscow (Russia); Moscow Institute of Physics and Technology, Dolgoprudny (Russia)
Publication Date:
Grant/Contract Number:
NA0002924; NA0002847; SC0013365; AC02-06CH11357; AC05-00OR22725; 05P12RFFTG; 015P15SJCIA; 16-12-10155; 16-12-10161
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; laser spectroscopy; charge radii; rare isotopes
OSTI Identifier:
1340283
Alternate Identifier(s):
OSTI ID: 1336882