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Title: Chiral NNLO sat descriptions of nuclear multipole resonances within the random-phase approximation

Abstract

We study nuclear multipole resonances in the framework of the random-phase approximation by using the chiral potential NNLO sat. This potential includes two- and three-body terms that have been simultaneously optimized to low-energy nucleon-nucleon scattering data and selected nuclear structure data. Our main focuses have been the isoscalar monopole, isovector dipole, and isoscalar quadrupole resonances of the closed-shell nuclei, 4He, 16,22,24O, and 40,48Ca. These resonance modes have been widely observed in experiment. In addition, we use a renormalized chiral potential Vlow-k, based on the N 3LO two-body potential by Entem and Machleidt [Phys. Rev. C 68, 041001 (2011)]. This introduces a dependency on the cutoff parameter used in the normalization procedure as reported in previous works by other groups. While NNLO sat can reasonably reproduce observed multipole resonances, it is not possible to find a single cutoff parameter for the V low-k potential that simultaneously describes the different types of resonance modes. The sensitivity to the cutoff parameter can be explained by missing induced three-body forces in the calculations. Our results for neutron-rich 22,24O show a mixing nature of isoscalar and isovector resonances in the dipole channel at low energies. We predict that 22O and 24O have low-energy isoscalar quadrupolemore » resonances at energies lower than 5 MeV.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [3]
  1. Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics and Technology
  2. Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics and Technology; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Sciences
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1459270
Alternate Identifier(s):
OSTI ID: 1435873
Grant/Contract Number:  
AC05-00OR22725; 11235001; 11320101004; 11575007; SC0009971; FG02-96ER40963; SC0008499
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Wu, Q., Hu, B S., Xu, Furong, Ma, Y. Z., Dai, S. J., Sun, Zhonghao, and Jansen, Gustav R. Chiral NNLOsat descriptions of nuclear multipole resonances within the random-phase approximation. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.054306.
Wu, Q., Hu, B S., Xu, Furong, Ma, Y. Z., Dai, S. J., Sun, Zhonghao, & Jansen, Gustav R. Chiral NNLOsat descriptions of nuclear multipole resonances within the random-phase approximation. United States. doi:10.1103/PhysRevC.97.054306.
Wu, Q., Hu, B S., Xu, Furong, Ma, Y. Z., Dai, S. J., Sun, Zhonghao, and Jansen, Gustav R. Thu . "Chiral NNLOsat descriptions of nuclear multipole resonances within the random-phase approximation". United States. doi:10.1103/PhysRevC.97.054306.
@article{osti_1459270,
title = {Chiral NNLOsat descriptions of nuclear multipole resonances within the random-phase approximation},
author = {Wu, Q. and Hu, B S. and Xu, Furong and Ma, Y. Z. and Dai, S. J. and Sun, Zhonghao and Jansen, Gustav R.},
abstractNote = {We study nuclear multipole resonances in the framework of the random-phase approximation by using the chiral potential NNLOsat. This potential includes two- and three-body terms that have been simultaneously optimized to low-energy nucleon-nucleon scattering data and selected nuclear structure data. Our main focuses have been the isoscalar monopole, isovector dipole, and isoscalar quadrupole resonances of the closed-shell nuclei, 4He, 16,22,24O, and 40,48Ca. These resonance modes have been widely observed in experiment. In addition, we use a renormalized chiral potential Vlow-k, based on the N3LO two-body potential by Entem and Machleidt [Phys. Rev. C 68, 041001 (2011)]. This introduces a dependency on the cutoff parameter used in the normalization procedure as reported in previous works by other groups. While NNLOsat can reasonably reproduce observed multipole resonances, it is not possible to find a single cutoff parameter for the Vlow-k potential that simultaneously describes the different types of resonance modes. The sensitivity to the cutoff parameter can be explained by missing induced three-body forces in the calculations. Our results for neutron-rich 22,24O show a mixing nature of isoscalar and isovector resonances in the dipole channel at low energies. We predict that 22O and 24O have low-energy isoscalar quadrupole resonances at energies lower than 5 MeV.},
doi = {10.1103/PhysRevC.97.054306},
journal = {Physical Review C},
number = 5,
volume = 97,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2018},
month = {Thu May 03 00:00:00 EDT 2018}
}

Journal Article:
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