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Neutron and weak-charge distributions of the 48Ca nucleus

Journal Article · · Nature Physics
DOI:https://doi.org/10.1038/nphys3529· OSTI ID:1242672
 [1];  [1];  [2];  [1];  [3];  [1];  [1];  [4];  [5];  [6];  [7];  [7];  [8];  [9];  [10];  [7];  [7]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Chalmers Univ. of Technology, Göteborg (Sweden). Dept. of Fundamental Physics
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy and NSCL/FRIB; Univ. of Warsaw, Pasteura, Warsaw (Poland). Faculty of Physics
  4. TRIUMF, Vancouver, British Columbia (Canada); Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Physics and Astronomy
  5. Hebrew Univ., Jerusalem (Israel). Racah Inst. of Physics
  6. Chalmers Univ. of Technology, Göteborg (Sweden). Dept. of Fundamental Physics
  7. Technische Univ. Darmstadt, Darmstadt, (Germany). Inst. für Kernphysik; GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany). ExtreMe Matter Institute (EMMI)
  8. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy and NSCL/FRIB; Univ. of Oslo, Oslo (Norway). Dept. of Physics
  9. TRIUMF, Vancouver, British Columbia (Canada); Univ. of British Columbia, Vancouver, British Columbia (Canada). Dept. of Physics and Astronomy
  10. Univ. degli Studi di Trento, Trento (Italy). Dipartimento di Fisica; Trento Inst. for Fundamental Physics and Applications (TIFPA), Trento (Italy). Inst. Nazionale di Fisica Nucleare,
+ Show Author Affiliations

What is the size of the atomic nucleus? This deceivably simple question is difficult to answer. Although the electric charge distributions in atomic nuclei were measured accurately already half a century ago, our knowledge of the distribution of neutrons is still deficient. In addition to constraining the size of atomic nuclei, the neutron distribution also impacts the number of nuclei that can exist and the size of neutron stars. We present an ab initio calculation of the neutron distribution of the neutron-rich nucleus 48Ca. We show that the neutron skin (difference between the radii of the neutron and proton distributions) is significantly smaller than previously thought. We also make predictions for the electric dipole polarizability and the weak form factor; both quantities that are at present targeted by precision measurements. Here, based on ab initio results for 48Ca, we provide a constraint on the size of a neutron star.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1242672
Journal Information:
Nature Physics, Journal Name: Nature Physics Journal Issue: 2 Vol. 12; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English

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Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin journal June 2017
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Precision Mass Measurements of Cr 58 – 63 : Nuclear Collectivity Towards the N = 40 Island of Inversion journal June 2018
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From Calcium to Cadmium: Testing the Pairing Functional through Charge Radii Measurements of Cd 100 − 130 journal September 2018
Chiral Interactions up to Next-to-Next-to-Next-to-Leading Order and Nuclear Saturation journal January 2019
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