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 Title: DETECTION AND CHARACTERIZATION OF THE STANNYLENE (SnH2 ) RADICAL IN THE GAS PHASE Author(s): Smith, Tony Contributor(s): Clouthier, Dennis Subject(s): Radicals Abstract: The electronic spectrum of the jet-cooled SnH$_{2}$ radical has been detected by LIF spectroscopy. The radical was produced in a pulsed electric discharge through a precursor mixture of SnH$_{4}$ in argon. Each band in the LIF spectrum consists of a small number of rovibronic transitions to the lowest energy (K$_{a}$ = 0, J = 0,1,2,3) rotational levels in the excited state. High resolution spectra of the $^{p}$P$_{1}$(1) line of the 2$^{2}$$_{0}$ band show 7 components whose relative intensities are characteristic of the tin major isotopic abundances. The emission spectra are also consistent with assigning the spectrum as due to SnH$_{2}$. The fluorescence lifetimes of the upper state rotational levels decrease with increasing J', indicative of a rotationally dependent predissociation process in the excited state, similar to that previously observed in SiH$_{2}$ and GeH$_{2}$. Fluorescence hole burning experiments have located the upper state K$_{a}$ = 2 levels which allow a determination of the molecular structure. Issue Date: 6/22/2017 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/97161 DOI: 10.15278/isms.2017.RJ08 Date Available in IDEALS: 2017-07-27
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