Microscopic optical potentials for calcium isotopes
Abstract
We construct nucleonic microscopic optical potentials by combining the Green's function approach with the coupled-cluster method for 40Ca and 48Ca. For the computation of the ground states of 40Ca and 48Ca, we use the coupled-cluster method in the singles-and-doubles approximation, while for the A = ±1 nuclei we use particle-attached and particle-removed equation-of-motion method truncated at two-particle–one-hole and one-particle–two-hole excitations, respectively. Our calculations are based on the chiral nucleon-nucleon and three-nucleon interaction NNLOsat, which reproduces the charge radii of 40Ca and 48Ca, and the chiral nucleon-nucleon 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 many-body correlations that would appear beyond the coupled-cluster 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 Lab. (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:
- AC05-00OR22725; FG02-13ER41967; FG52-08NA28552; SC0013365; SC0008499; SC0018223; ERKBP57; ERKBP72
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 4; Journal ID: ISSN 2469-9985
- 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. 2018.
"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 coupled-cluster method for 40Ca and 48Ca. For the computation of the ground states of 40Ca and 48Ca, we use the coupled-cluster method in the singles-and-doubles approximation, while for the A = ±1 nuclei we use particle-attached and particle-removed equation-of-motion method truncated at two-particle–one-hole and one-particle–two-hole excitations, respectively. Our calculations are based on the chiral nucleon-nucleon and three-nucleon interaction NNLOsat, which reproduces the charge radii of 40Ca and 48Ca, and the chiral nucleon-nucleon 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 many-body correlations that would appear beyond the coupled-cluster 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},
url = {https://www.osti.gov/biblio/1545568},
journal = {Physical Review C},
issn = {2469-9985},
number = 4,
volume = 98,
place = {United States},
year = {Mon Oct 29 00:00:00 EDT 2018},
month = {Mon Oct 29 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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