Precision half-life determination for the β+ emitter 13N

Published in Physical Review C, 2022

DOI: 10.1103/PhysRevC.106.045501
Recommended citation: J. Long, C. R. Nicoloff, et al., Phys. Rev. C 106, 045501 (2022). (download)

A new precision half-life measurement of 13N has been conducted using the TwinSol β-counting station at the University of Notre Dame. The measured value of tnew1/2=597.05(19) s differs from the previous world value by about 2.8σ. An evaluation of the 13N half-life results in a tworld1/2=597.19(22) s. Updated standard model predictions for the Fermi to Gamow-Teller mixing ratio ρ and its associated correlation parameters have been calculated using the new 13N world half-life in preparation for a future measurement of the mixing ratio. Finally, an ab initio no-core configuration interaction (NCCI) calculation for the $B(GT)$ of this decay, carried out using the Daejeon16 interaction, has been performed, revealing the need for higher-order chiral corrections.