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Title: Electric dipole polarizability and the neutron skin

Abstract

The recent high-resolution measurement of the electric dipole (E1) polarizability αD in 208Pb [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 rskin of 208Pb 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 αD and rskin, we carry out systematic calculations for 208Pb, 132Sn, and 48Ca 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 αD and rskin, 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 rskin and αD for the nuclei under consideration. We conclude that precise measurements of rskin in both 48Ca and 208Pb—combined with the recent measurement of αD—should significantly constrain the isovector sector of the nuclear energy density functional.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of Tennessee, Knoxville, TN (United States); Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1564888
DOE Contract Number:  
FG02-96ER40963; FG05-92ER40750
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 85; Journal Issue: 4; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
Physics

Citation Formats

Piekarewicz, J., Agrawal, B. K., Colò, G., Nazarewicz, W., Paar, N., Reinhard, P. -G., Roca-Maza, X., and Vretenar, D. Electric dipole polarizability and the neutron skin. United States: N. p., 2012. Web. doi:10.1103/physrevc.85.041302.
Piekarewicz, J., Agrawal, B. K., Colò, G., Nazarewicz, W., Paar, N., Reinhard, P. -G., Roca-Maza, X., & Vretenar, D. Electric dipole polarizability and the neutron skin. United States. https://doi.org/10.1103/physrevc.85.041302
Piekarewicz, J., Agrawal, B. K., Colò, G., Nazarewicz, W., Paar, N., Reinhard, P. -G., Roca-Maza, X., and Vretenar, D. 2012. "Electric dipole polarizability and the neutron skin". United States. https://doi.org/10.1103/physrevc.85.041302.
@article{osti_1564888,
title = {Electric dipole polarizability and the neutron skin},
author = {Piekarewicz, J. and Agrawal, B. K. and Colò, G. and Nazarewicz, W. and Paar, N. and Reinhard, P. -G. and Roca-Maza, X. and Vretenar, D.},
abstractNote = {The recent high-resolution measurement of the electric dipole (E1) polarizability αD in 208Pb [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 rskin of 208Pb 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 αD and rskin, we carry out systematic calculations for 208Pb, 132Sn, and 48Ca 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 αD and rskin, 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 rskin and αD for the nuclei under consideration. We conclude that precise measurements of rskin in both 48Ca and 208Pb—combined with the recent measurement of αD—should significantly constrain the isovector sector of the nuclear energy density functional.},
doi = {10.1103/physrevc.85.041302},
url = {https://www.osti.gov/biblio/1564888}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 4,
volume = 85,
place = {United States},
year = {2012},
month = {4}
}

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