Br. Barrett et al., LARGE-BASIS NO-CORE SHELL-MODEL CALCULATIONS AND THEIR APPLICATION TOC-10-]B-10 FERMI BETA-DECAY, Czechoslovak journal of Physics, 48(6-7), 1998, pp. 691-696
We use a 4 (h) over bar Omega shell-model calculation with a two-body
effective interaction derived microscopically from the Reid93 potentia
l to calculate the isospin-mixing correction for the C-10 --> B-10 sup
erallowed Fermi transition. The effective interaction takes into accou
nt the Coulomb potential as well as the charge dependence of T = 1 par
tial waves. Our results suggest the isospin-mixing correction delta c
approximate to 0.1%, which is compatible with previous calculations ob
tained by other methods. The obtained delta(C) correction is about a f
actor of four too small to obtain unitarity of the Cabibbo-Kobayashi-M
askawa matrix with the present experimental data.