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Title: Variational Calculation of the Ground State of Closed-Shell Nuclei Up to $$A$$ = 40

Journal Article · · Physical Review C, Nuclear Physics
ORCiD logo [1];  [2];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Michigan State Univ., East Lansing, MI (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

Variational calculations of ground-state properties of 4He,16O, and 40Ca are carried out employing realistic phenomenological two- and three-nucleon potentials. The trial wave function includes two- and three-body correlations acting on a product of single-particle determinants. Expectation values are evaluated with a cluster expansion for the spin-isospin dependent correlations considering up to five-body cluster terms. The optimal wave function is obtained by minimizing the energy expectation value over a set of up to 20 parameters by means of a nonlinear optimization library. We present results for the binding energy, charge radius, one- and two-body densities, single-nucleon momentum distribution, charge form factor, and Coulomb sum rule. We find that the employed three-nucleon interaction becomes repulsive for A≥16. In 16O the inclusion of such a force provides a better description of the properties of the nucleus. In 40Ca instead, the repulsive behavior of the three-body interaction fails to reproduce experimental data for the charge radius and the charge form factor. We find that the high-momentum region of the momentum distributions, determined by the short-range terms of nuclear correlations, exhibits a universal behavior independent of the particular nucleus. The comparison of the Coulomb sum rules for 4He,16O, and 40Ca reported in this work will help elucidate in-medium modifications of the nucleon form factors.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC02-06CH11357; AC52-06NA25396; SC0013617; AC02-05CH11231
OSTI ID:
1378564
Alternate ID(s):
OSTI ID: 1377956; OSTI ID: 1394976; OSTI ID: 1598815
Report Number(s):
LA-UR-17-23856; 135687
Journal Information:
Physical Review C, Nuclear Physics, Vol. 96, Issue 2; ISSN 0556-2813
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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