# He CLUSTERS AS A MATRIX FOR PREPARATION OF $Na-(H_{2})_{12}$ COMPLEXES

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 Title: He CLUSTERS AS A MATRIX FOR PREPARATION OF $Na-(H_{2})_{12}$ COMPLEXES Creators: Callegari, C.; Higgins, J.; Reho, J.; Lehmann, K. K.; Scoles, G. Issue Date: 1997 Publisher: Ohio State University Abstract: Large He clusters (containing up to $10^{4}$ atoms) have been employed as a substrate to produce $Na-(H_{2})_{12} (n < 10)$ complexes, making use of the pick-up technique. Laser Induced Fluorescence and Beam Depletion are used to spectroscopically investigate such complexes in the frequency region of Na D lines. A strong exponential decay of the total amount of collected fluorescence is observed as a function of $H_{2}$ pressure in the pink-up region. While Beam Depletion Spectra intensities are virtually unaffected, thus demonstrating the high quenching efficiency of $H_{2}$. Spectra are them compared to those of Na atoms on pure He or $H_{2}$ clusters. Interestingly, spectra of $Na-(H_{2})$ complexes show spectral features similar to those of Na on pure $H_{2}$ clusters only with smaller shifts with respect to the D lines position. Time resolved measurements are currently being taken and will be presented at the meeting. Description: Author Institution: Chemistry Department, Princeton University URI: http://hdl.handle.net/1811/14168 Other Identifiers: 1997-WH-09