# THE LOW ENERGY ONSET OF $CS_{2}$ BIEXPONENTIAL FLUORESCENCE DECAYS

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 Title: THE LOW ENERGY ONSET OF $CS_{2}$ BIEXPONENTIAL FLUORESCENCE DECAYS Creators: Nguyen, M.; Silvers, S. J. Issue Date: 1995 Publisher: Ohio State University Abstract: Biexponential decays are characterestic of fluorescence from the rovibrational levels of the $T {^{1}A_{2}} and V {^{1}B_{2}}$ states of $CS_{2}$. The longer-lived component is associated with continum-like emission. Biexponential decays first appear in the emission from rovibrational levels of the lower lying R state (The $B_{2}$ spin component of a $^{3}A_{2}$ electronic state.) The first biexponential behavior appears in decays from the (1, 6, 0) vibrational level at $T_{o} = 28,635 cm^{-1}$. Time delayed excitation scans show that the longer-lived component $(6-8 \mu s)$ is principally due to a weak, underlying type band. Decays from the (0, 9, 0) level at $T_{o} = 28,817 cm^{-1}$ and higher vibrational levels all require bi- or multiexponential fits. Delay scans for these levels show that the excitation spectra of the long-lived component closely mimic those of the short-lived one. Explanations for this similarity are considered. Description: Author Institution: Virginia Commonwealth University, Richmond, VA 23284. URI: http://hdl.handle.net/1811/29587 Other Identifiers: 1995-RB-08