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- W1543132324 abstract "$^{44}mathrm{Ti}$(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 ${0}^{mathrm{ensuremath{-}}}$ and ${1}^{mathrm{ensuremath{-}}}$ levels of $^{44}mathrm{Sc}$ as well as to other ancillary results including precision ensuremath{gamma}-ray energy determinations, ensuremath{gamma}-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 ${0}^{+}$ensuremath{rightarrow}${0}^{mathrm{ensuremath{-}}}$ decay provides some further evidence for the existence of a large meson enhancement of the ensuremath{Delta}J=0 timelike component of the axial current." @default.
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- W1543132324 date "1988-10-01" @default.
- W1543132324 modified "2023-09-25" @default.
- W1543132324 title "First-forbidden0+→0−,1−electron capture ofTi44" @default.
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- W1543132324 doi "https://doi.org/10.1103/physrevc.38.1843" @default.
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