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Ab initio Computation of Neutron-Rich Oxygen Isotopes

Journal Article · · Physical Review C
 [1];  [2];  [1];  [3];  [4]
  1. ORNL
  2. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  3. University of Oslo, Norway
  4. Oak Ridge National Laboratory (ORNL)
+ Show Author Affiliations
We compute the binding energy of neutron-rich oxygen isotopes and employ the coupled-cluster method and chiral nucleon-nucleon interactions at next-to-next-to-next-to-leading order with two different cutoffs. We obtain rather well-converged results in model spaces consisting of up to 21 oscillator shells. For interactions with a momentum cutoff of 500 MeV, we find that ^{28}O is stable with respect to ^{24}O, while calculations with a momentum cutoff of 600 MeV result in a slightly unbound ^{28}O. The theoretical error estimates due to the omission of the three-nucleon forces and the truncation of excitations beyond three-particle three-hole clusters indicate that the stability of ^{28}O cannot be ruled out from ab-initio calculations, and that three-nucleon forces and continuum effects play the dominant role in deciding this question.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Laboratory (ORNL)
Sponsoring Organization:
DOE Office of Science; SC USDOE - Office of Science (SC)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
979229
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 2 Vol. 80
Country of Publication:
United States
Language:
English

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