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Title: Electric dipole polarizability and the neutral skin

Abstract

The recent high-resolution measurement of the electric dipole (E1) polarizability {alpha}{sub D} in {sup 208}Pb [A. Tamii et al. Phys. Rev. Lett. 107 062502 (2011)] provides a unique constraint on the neutron-skin thickness of this nucleus. The neutron-skin thickness r{sub skin} of {sup 208}Pb is a quantity of critical importance for our understanding of a variety of nuclear and astrophysical phenomena. To assess the model dependence of the correlation between {alpha}{sub D} and r{sub skin}, we carry out systematic calculations for {sup 208}Pb, {sup 132}Sn, and {sup 48}Ca based on the nuclear density functional theory using both nonrelativistic and relativistic energy density functionals. Our analysis indicates that whereas individual models exhibit a linear dependence between {alpha}{sub D} and r{sub skin}, this correlation is not universal when one combines predictions from a host of different models. By averaging over these model predictions, we provide estimates with associated systematic errors for r{sub skin} and {alpha}{sub D} for the nuclei under consideration. We conclude that precise measurements of r{sub skin} in both {sup 48}Ca and {sup 208}Pb - combined with the recent measurement of {alpha}{sub D} - should significantly constrain the isovector sector of the nuclear energy density functional.

Authors:
 [1];  [2];  [3];  [2];  [2];  [2];  [4];  [2]
  1. Louisiana State University
  2. ORNL
  3. Universitat Erlangen, Germany
  4. IFGA, University of Milan and INFN, Milano, Italy
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1050901
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 85; Journal Issue: 4; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY AND ECONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRIC DIPOLES; ENERGY DENSITY; FUNCTIONALS; ISOVECTORS; NEUTRONS; NUCLEAR ENERGY; NUCLEAR MATTER; NUCLEI; POLARIZABILITY; THICKNESS

Citation Formats

Piechaczek, A., Nazarewicz, Witold, Reinhard, P. -G., Agrawal, Bijay K, Colo, Gianluca, Paar, Nils, Roca-Maza, X, and Vretenar, Dario. Electric dipole polarizability and the neutral skin. United States: N. p., 2012. Web.
Piechaczek, A., Nazarewicz, Witold, Reinhard, P. -G., Agrawal, Bijay K, Colo, Gianluca, Paar, Nils, Roca-Maza, X, & Vretenar, Dario. Electric dipole polarizability and the neutral skin. United States.
Piechaczek, A., Nazarewicz, Witold, Reinhard, P. -G., Agrawal, Bijay K, Colo, Gianluca, Paar, Nils, Roca-Maza, X, and Vretenar, Dario. Sun . "Electric dipole polarizability and the neutral skin". United States.
@article{osti_1050901,
title = {Electric dipole polarizability and the neutral skin},
author = {Piechaczek, A. and Nazarewicz, Witold and Reinhard, P. -G. and Agrawal, Bijay K and Colo, Gianluca and Paar, Nils and Roca-Maza, X and Vretenar, Dario},
abstractNote = {The recent high-resolution measurement of the electric dipole (E1) polarizability {alpha}{sub D} in {sup 208}Pb [A. Tamii et al. Phys. Rev. Lett. 107 062502 (2011)] provides a unique constraint on the neutron-skin thickness of this nucleus. The neutron-skin thickness r{sub skin} of {sup 208}Pb is a quantity of critical importance for our understanding of a variety of nuclear and astrophysical phenomena. To assess the model dependence of the correlation between {alpha}{sub D} and r{sub skin}, we carry out systematic calculations for {sup 208}Pb, {sup 132}Sn, and {sup 48}Ca based on the nuclear density functional theory using both nonrelativistic and relativistic energy density functionals. Our analysis indicates that whereas individual models exhibit a linear dependence between {alpha}{sub D} and r{sub skin}, this correlation is not universal when one combines predictions from a host of different models. By averaging over these model predictions, we provide estimates with associated systematic errors for r{sub skin} and {alpha}{sub D} for the nuclei under consideration. We conclude that precise measurements of r{sub skin} in both {sup 48}Ca and {sup 208}Pb - combined with the recent measurement of {alpha}{sub D} - should significantly constrain the isovector sector of the nuclear energy density functional.},
doi = {},
url = {https://www.osti.gov/biblio/1050901}, journal = {Physical Review C},
issn = {0556-2813},
number = 4,
volume = 85,
place = {United States},
year = {2012},
month = {1}
}