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Systematic Matter and Binding-Energy Distributions from a Dispersive Optical Model Analysis.

C D Pruitt1, R J Charity1, L G Sobotka1,2

  • 1Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA.

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|September 21, 2020
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Summary
This summary is machine-generated.

This study analyzes nuclear binding energy and neutron skins in oxygen, calcium, nickel, tin, and lead isotopes. Results reveal key factors influencing neutron skin thickness and offer new methods for nuclear structure studies.

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Area of Science:

  • Nuclear Physics
  • Atomic Physics

Background:

  • Nuclear binding energy is crucial for understanding atomic nuclei.
  • Neutron skins, the excess of neutrons on the nuclear surface, impact nuclear stability and reactions.
  • Previous studies often analyzed nuclear properties separately, limiting comprehensive understanding.

Purpose of the Study:

  • To perform the first systematic nonlocal dispersive optical model analysis of nuclear structure.
  • To investigate the relationship between nuclear binding energy, neutron skins, and isotopic properties.
  • To develop a more effective method for constraining asymmetry-dependent nuclear structural quantities.

Main Methods:

  • Utilized bound-state and scattering data for isotopic pairs of oxygen, calcium, nickel, tin, and lead.
  • Employed a systematic nonlocal dispersive optical model analysis.
  • Simultaneously fitted inelastic scattering and structural data.

Main Results:

  • Approximately 50% of nuclear binding energy resides in the densest 10% of nucleons.
  • Extracted neutron skins demonstrate the combined influence of asymmetry, Coulomb, and shell effects.
  • The analysis successfully constrained nuclear structural quantities.

Conclusions:

  • Simultaneous analysis of scattering and structural data is effective for nuclear structure studies.
  • This approach provides insights into neutron skin thickness and its dependencies.
  • The findings contribute to a deeper understanding of nuclear forces and properties.