Knowledge Bank

Laser induced flourescence studies of stontium monoxid in a Broida-type oven yield an analysis of several excited triplet states. SrO molecules are excited from the a $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}\Pi$ state into two different $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}\Pi$ states about $26100cm-1$ above the ground state. Successive fluorescence into the $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma$ ground state, the a $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}\Pi$ state as well as the b $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}\Sigma$ state is observed. Using a least squares fit program, spectroscopic constants for these states were obtained. The parameters for the a $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}\Pi$ state are in good agreement with those published by Field [1]. Beyond $J=55$, the g $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}\Pi$ state appears to be strongly perturbed. The main constants of the assigned states are (in $cm-1$):[FIGURE] [1] R.W. Field, J. Chem. Phys., Vol. 60, 2400 (1974)