Lifetimes have been measured by direct timing for the 1582 keV, $\frac{3}{2^{-}}$ level of ${}_{}{}^{41}{}_{}{}^{}\mathrm{K}$($\tau <38\mathrm{}$ ps) and the 2010 keV, $\frac{3}{2^{+}}$ level of ${}_{}{}^{41}{}_{}{}^{}\mathrm{Ca}$($\tau =730\mathrm{}\pm 18$ ps). These levels are members of closely spaced parity doublets. The sensitivity of measurements to determine the parity mixing within these doublets is discussed.

NUCLEAR REACTIONS ${}_{}{}^{41}{}_{}{}^{}\mathrm{K}$($p$,$p\gamma$), $E_x=1582\mathrm{}$ keV, measured $\tau$; ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$($d$,$p\gamma$), $E_x=2010\mathrm{}$ keV, measured $\tau$. Direct timing.

• Received 14 February 1980

DOI:https://doi.org/10.1103/PhysRevC.21.2322