期刊
PHYSICAL REVIEW C
卷 102, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.102.025501
关键词
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资金
- computers of the Argonne Leadership Computing Facility (ALCF) via the 2019/2020 ALCC grant
- 2020 INCITE grant Ab-initio nuclear structure and nuclear reactions
- NUclear Computational Low-Energy Initiative (NUCLEI) SciDAC project
- US Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC05-06OR23177, DE-AC02-06CH11357, DE-AC52-06NA25396]
- U.S. Department of Energy funds through the FRIB Theory Alliance [DE-SC0013617]
- U.S. Department of Energy (DOE) [DE-SC0013617] Funding Source: U.S. Department of Energy (DOE)
We report quantum Monte Carlo calculations of weak transitions in A 10 nuclei, based on the Norfolk two-and three-nucleon chiral interactions, and associated one-and two-body axial currents. We find that the contribution from two-body currents is at the 2-3% level, with the exception of matrix elements entering the rates of Li-8, B-8, and He-8 beta decay. These matrix elements are suppressed in impulse approximation based on the (leading order) Gamow Teller transition operator alone; two-body currents provide a 20-30% correction, which is, however, insufficient to bring theory in agreement with experimental data. For the other transitions, the agreement with the data is satisfactory, and the results exhibit a negligible to mild model dependence when different combinations of Norfolk interactions are utilized to construct the nuclear wave functions. We report a complete study of two-body weak transition densities which reveals the expected universal behavior of two-body currents at short distances throughout the range of A = 3 to A = 10 systems considered here.
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