Studies of the \textbf{\textit{5s$^{21}$S$_{0}$-- 5s5p$^{3}$P$_{1}$}} Transition in Atomic Strontium

The importance of the $5s^{21}S_{0 }-- 5s5p^{3}P_{1}$ intercombination line of strontium (Sr) as a possible candidate for optical frequency standards requires precise knowledge of the properties of this transition. Using the established electron-shelving technique on a cloud of laser cooled and trapped Sr atoms, we measured the lifetime of the $^{3}P_{1}$ state. Studies of the linewidth of the transition allowed us to determine the linewidth of the pumping laser used in the experiment, which is important for future applications in laser cooling.