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Updated: Apr 18, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
Effects of three-nucleon forces and two-body currents on Gamow-Teller strengths
A Ekström1, G R Jansen2, K A Wendt2
1Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo, Norway.
Abstract:
We optimize chiral interactions at next-to-next-to leading order to observables in two- and three-nucleon systems and compute Gamow-Teller transitions in 14C and (22,24)O using consistent two-body currents. We compute spectra of the daughter nuclei 14N and (22,24)F via an isospin-breaking coupled-cluster technique, with several predictions. The two-body currents reduce the Ikeda sum rule, corresponding to a quenching factor q2≈0.84-0.92 of the axial-vector coupling. The half-life of 14C depends on the energy of the first excited 1+ state, the three-nucleon force, and the two-body current.
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