Dispersive optical model analysis of 208Pb generating a neutron-skin prediction beyond the mean field

被引：34

作者：

Atkinson, M. C. ^{[1
,2
]}

Mahzoon, M. H. ^{[2
]}

Keim, M. A. ^{[2
]}

Bordelon, B. A. ^{[2
]}

Pruitt, C. D. ^{[3
]}

Charity, R. J. ^{[3
]}

Dickhoff, W. H. ^{[2
]}

机构：

[1] TRIUMF, Theory Grp, Vancouver, BC V6T 2A3, Canada

[2] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[3] Washington Univ, Dept Chem, St Louis, MO 63130 USA

来源：

PHYSICAL REVIEW C | 2020年 / 101卷 / 04期

基金：

美国国家科学基金会;

关键词：

ELECTRON-SCATTERING; CHARGE-DENSITY; NUCLEI; RADII; STATE;

D O I：

10.1103/PhysRevC.101.044303

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A nonlocal dispersive optical model analysis is carried out for neutrons and protons in Pb-208. Elastic-scattering angular distributions, total and reaction cross sections, single-particle energies, neutron and proton numbers, the charge distribution, and the binding energy are fitted to extract the neutron and proton self-energies both above and below the Fermi energy. From the single-particle propagator derived from these self-energies, we determine the charge and matter distributions in (20)8Pb. The predicted spectroscopic factors are consistent with results from the (e, e'p) reaction and inelastic-electron-scattering data to very high-spin states. Sensible results for the high-momentum content of neutrons and protons are obtained, with protons appearing more correlated, in agreement with experiment and ab initio calculations of asymmetric matter. A neutron skin of 0.25 +/- 0.05 fm is deduced. An analysis of several nuclei leads to the conclusion that finite-size effects play a nonnegligible role in the formation of the neutron skin in finite nuclei.

引用

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