Lifetimes of the 3d54s4p z6P52 and y6P52 levels of Mn

The lifetimes of the 3d⁵4s4p z⁶P$\text{5}\text{2}$ and y⁶P$\text{5}\text{2}$ levels of manganese have been measured by the method of zero field level crossing (Hanle effect). The following preliminary results have been derived: $\text{τ(}\text{z}{}^6\text{P}\text{5}\text{2}\text{) = (0.60 ± 0.07) × 10}{}^{\mathrm{-7}}\text{sec}$ and $\text{τ(}\text{y}{}^6\text{P}\text{5}\text{2}\text{= (0.57 ± 0.12) × 10}{}^{\mathrm{-9}}\text{sec}$.