Microscopic optical potentials for calcium isotopes
Abstract
We construct nucleonic microscopic optical potentials by combining the Green's function approach with the coupledcluster method for ^{40}Ca and ^{48}Ca. For the computation of the ground states of ^{40}Ca and ^{48}Ca, we use the coupledcluster method in the singlesanddoubles approximation, while for the A = ±1 nuclei we use particleattached and particleremoved equationofmotion method truncated at twoparticle–onehole and oneparticle–twohole excitations, respectively. Our calculations are based on the chiral nucleonnucleon and threenucleon interaction NNLO_{sat}, which reproduces the charge radii of ^{40}Ca and ^{48}Ca, and the chiral nucleonnucleon interaction NNLO_{opt}. In all cases considered here, we observe that the overall form of the neutron scattering cross section is reproduced for both interactions, but the imaginary part of the potential, which reflects the loss of flux in the elastic channel, is negligible. Furthermore, the latter points to neglected manybody correlations that would appear beyond the coupledcluster truncation level considered in this work. We show that, by artificially increasing the parameter η in the Green's function, practical results can be further improved.
 Authors:

 Michigan State Univ., East Lansing, MI (United States)
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Publication Date:
 Research Org.:
 Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
 Sponsoring Org.:
 USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
 OSTI Identifier:
 1545568
 Alternate Identifier(s):
 OSTI ID: 1479607
 Grant/Contract Number:
 AC0500OR22725; FG0213ER41967; FG5208NA28552; SC0013365; SC0008499; SC0018223; ERKBP57; ERKBP72
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review C
 Additional Journal Information:
 Journal Volume: 98; Journal Issue: 4; Journal ID: ISSN 24699985
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS
Citation Formats
Rotureau, Jimmy, Danielewicz, P., Hagen, Gaute, Jansen, Gustav R., and Nunes, F. M. Microscopic optical potentials for calcium isotopes. United States: N. p., 2018.
Web. doi:10.1103/PhysRevC.98.044625.
Rotureau, Jimmy, Danielewicz, P., Hagen, Gaute, Jansen, Gustav R., & Nunes, F. M. Microscopic optical potentials for calcium isotopes. United States. https://doi.org/10.1103/PhysRevC.98.044625
Rotureau, Jimmy, Danielewicz, P., Hagen, Gaute, Jansen, Gustav R., and Nunes, F. M. Mon .
"Microscopic optical potentials for calcium isotopes". United States. https://doi.org/10.1103/PhysRevC.98.044625. https://www.osti.gov/servlets/purl/1545568.
@article{osti_1545568,
title = {Microscopic optical potentials for calcium isotopes},
author = {Rotureau, Jimmy and Danielewicz, P. and Hagen, Gaute and Jansen, Gustav R. and Nunes, F. M.},
abstractNote = {We construct nucleonic microscopic optical potentials by combining the Green's function approach with the coupledcluster method for 40Ca and 48Ca. For the computation of the ground states of 40Ca and 48Ca, we use the coupledcluster method in the singlesanddoubles approximation, while for the A = ±1 nuclei we use particleattached and particleremoved equationofmotion method truncated at twoparticle–onehole and oneparticle–twohole excitations, respectively. Our calculations are based on the chiral nucleonnucleon and threenucleon interaction NNLOsat, which reproduces the charge radii of 40Ca and 48Ca, and the chiral nucleonnucleon interaction NNLOopt. In all cases considered here, we observe that the overall form of the neutron scattering cross section is reproduced for both interactions, but the imaginary part of the potential, which reflects the loss of flux in the elastic channel, is negligible. Furthermore, the latter points to neglected manybody correlations that would appear beyond the coupledcluster truncation level considered in this work. We show that, by artificially increasing the parameter η in the Green's function, practical results can be further improved.},
doi = {10.1103/PhysRevC.98.044625},
journal = {Physical Review C},
number = 4,
volume = 98,
place = {United States},
year = {2018},
month = {10}
}
Web of Science
Figures / Tables:
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