Physical Review C
Ab initio calculations of the Gamow-Teller (GT) matrix elements in the β decays of 6He and 10C and electron captures in 7Be are carried out using both variational and Green's function Monte Carlo wave functions obtained from the Argonne v18 two-nucleon and Illinois-7 three-nucleon interactions, and axial many-body currents derived from either meson-exchange phenomenology or chiral effective field theory. The agreement with experimental data is excellent for the electron captures in 7Be, while theory overestimates the 6He and 10C data by ~2% and ~10%, respectively. We show that for these systems correlations in the nuclear wave functions are crucial to explaining the data, while many-body currents increase by ~2-3% the one-body GT contributions.
Original Publication Citation
Pastore, S., Baroni, A., Carlson, J., Gandolfi, S., Pieper, S. C., Schiavilla, R., & Wiringa, R. B. (2018). Quantum Monte Carlo calculations of weak transitions in A=6-10 nuclei. Physical Review C, 97(022501), 1-5. doi:10.1103/PhysRevC.97.022501
Pastore, S.; Baroni, A.; Gandolfi, S.; Schiavilla, R.; and Wiringa, R. B., "Quantum Monte Carlo Calculations of Weak Transitions in A=6-10 Nuclei" (2018). Physics Faculty Publications. 144.