Laser excitation spectra and lifetimes of Pb2 and Sn2 produced by YAG laser vaporization

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Abstract
A new and very general technique, combining pulsed laser vaporization with laser induced fluorescence is described. The gas phase electronic spectra of Pb2 cooled to near 77 °K by liquid N2 are very simple and yield the vibrational constants for the ground state and two low lying electronic states. Some lifetime information is also obtained and preliminary observations of Sn2 spectra are reported.