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Rovibrationally resolved radiative lifetime and collisional cross section measurements of the 61?g+(v=6,8,J=31) state of molecular sodium
(Elsevier Ltd, 2021) Wagle, Dinesh; Pant, Lok R.; Converse, Joseph; Wenner, Scott; Sağlam, Ziya; Bayram, S. Burçin
We report on radiative lifetime and collisional cross section measurements of the Na2 61?g+(v=6, J=31) and 61?g+(v=8, J=31) molecular levels by time-resolved laser spectroscopy. The excitation to the 61?g+(3s+5s) electronic state was achieved using two synchronized pulsed lasers, directed to the sodium heatpipe oven and molecular fluorescence decay time as a function of buffer gas was recorded via time-correlated single photon counting technique. Radiative lifetimes were measured using a Stern-Volmer plots. From the lifetime measurements, collisional cross sections between the sodium molecules in the 61?g+ state and the ground state argon atoms were extracted.