Abstract
Collisionally induced coherence transfer is observed for the first time, to our knowledge, between levels with different orbital angular momenta. A new method of precision atomic lifetime measurement is described. While requiring only a single laser, this method permits measurements on states that differ from the ground state by three units of angular momenta ($\ensuremath{\Delta}l=3$). Using this technique we have found the calcium $(3d4p)^{1}F$ lifetime to be 58.3 \ifmmode\pm\else\textpm\fi{} 2.0 nsec.
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