First-forbidden0+→0−,1−electron capture ofTi44

${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$(EC${)}^{44}$Sc was studied both experimentally and theoretically. The experimental study–motivated by current interest in first-forbidden beta decay–leads to more precise branching ratios for the electron capture decay to the $0^{\mathrm{-}}$ and $1^{\mathrm{-}}$ levels of ${}_{}{}^{44}{}_{}{}^{}\mathrm{Sc}$ as well as to other ancillary results including precision γ-ray energy determinations, γ-ray branching ratios from the 146-keV level of ${}_{}{}^{44}{}_{}{}^{}\mathrm{Sc}$, and lifetimes of the 68- and 146-keV excited states of ${}_{}{}^{44}{}_{}{}^{}\mathrm{Sc}$. Beta and gamma decays were considered in a spherical shell model calculation utilizing 0h-4p and 1h-5p model spaces (relative to ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$). The formulae relating non-unique first-forbidden electron capture decay rates to nuclear matrix elements have apparently never before been applied; therefore, the application is discussed in detail. The model predictions are not in very good agreement with experiment. Possible reasons for the poor agreement are discussed. Nevertheless, the $0^{+}$→$0^{\mathrm{-}}$ decay provides some further evidence for the existence of a large meson enhancement of the ΔJ=0 timelike component of the axial current.