Gamow-Teller (GT) transitions in $\beta$ decays of ${}^9\mathrm{Li}$ and ${}^{11}\mathrm{Li}$ are investigated with theoretical calculations of antisymmetrized molecular dynamics. The calculated $B$(GT) values are small for transitions to low-lying states in Be isotopes, whereas relatively large $B$(GT) values are found for excited states at excitation energy $E_x⩾10$ MeV. The sum of the $B$(GT) values is discussed for each spin-parity of final states. The calculated results seem to be inconsistent with an experimental report of the strongest GT transition from ${}^9\mathrm{Li}$ to the $5/2^{-}$ state of ${}^9\mathrm{Be}$ at $11.8$ MeV.

• Received 9 September 2009

DOI:https://doi.org/10.1103/PhysRevC.81.034321