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Title: Electric Dipole Polarizability of Ca 48 and Implications for the Neutron Skin

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [1];  [4];  [5];  [6];  [1];  [5];  [1];  [1];  [1];  [7];  [8]
  1. Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
  2. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
  3. TRIUMF, Vancouver, BC (Canada); Univ. of Manitoba, Winnipeg, MB (Canada)
  4. Texas A & M Univ., Commerce, TX (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  6. Osaka Univ. (Japan); Tokyo Women's Medical Univ. (Japan)
  7. Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik; Max Planck Inst. fur Kernphysik, Heidelberg (Germany); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  8. Osaka Univ. (Japan)

The electric dipole strength distribution in 48Ca between 5 and 25 MeV has been determined at RCNP, Osaka, from proton inelastic scattering experiments at forward angles. Combined with photoabsorption data at higher excitation energy, this enables the rst extraction of the electric dipole polarizability D(48Ca) = 2:07(22) fm3. Remarkably, the dipole response of 48Ca is found to be very similar to that of 40Ca, consistent with a small neutron skin in 48Ca. The experimental results are in good agreement with ab initio calculations based on chiral e ective eld theory interactions and with state-of-the-art density-functional calculations, implying a neutron skin in 48Ca of 0:14 - 0:20 fm.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-00OR22725; FG02-08ER41533; FG02-96ER40963; SC0008499
OSTI ID:
1394473
Alternate ID(s):
OSTI ID: 1366338
Journal Information:
Physical Review Letters, Vol. 118, Issue 25; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 107 works
Citation information provided by
Web of Science

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Cited By (22)

The radius of the canonical-mass neutron star and chiral effective field theory journal January 2019
Neutron skins of atomic nuclei: per aspera ad astra journal August 2019
Effects of nuclear symmetry energy and equation of state on neutron star properties journal October 2019
Chiral g -matrix folding-model approach to reaction cross sections for scattering of Ca isotopes on a C target journal January 2020
Origin of fine structure of the giant dipole resonance in s d -shell nuclei journal April 2018
Systematic study of giant quadrupole resonances with the subtracted second random-phase approximation: Beyond-mean-field centroids and fragmentation journal October 2018
Harmonic Potential Theorem: Extension to Spin-, Velocity-, and Density-Dependent Interactions journal September 2019
Uncertainties in constraining low-energy constants from 3H $ \beta$β decay journal August 2017
Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0° journal July 2019
First principles electromagnetic responses in medium-mass nuclei: Recent progress from coupled-cluster theory journal December 2019
Correlations among symmetry energy elements in Skyrme models journal September 2018
Cooling of Small and Massive Hyperonic Stars journal August 2018
Origin of fine structure of the giant dipole resonance in sd-shell nuclei text January 2014
Test of the Brink-Axel hypothesis for the pygmy dipole resonance text January 2016
Chiral interactions up to next-to-next-to-next-to-leading order and nuclear saturation text January 2017
Relativistic Brueckner-Hartree-Fock theory for neutron drops text January 2018
Correlations among symmetry energy elements in Skyrme models text January 2018
Nuclear symmetry energy and hadron-quark mixed phase in neutron stars text January 2018
The nucleon effective mass and its isovector splitting text January 2018
Neutron skins of atomic nuclei: per aspera ad astra text January 2019
Effects of nuclear symmetry energy and equation of state on neutron star properties text January 2019
$g$-matrix folding-model approach to reaction cross sections for scattering of Ca isotopes on a C target text January 2019

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