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WIDE-RANGE VISIBLE SPECTROSCOPY OF HIGH-SPIN ALKALI TRIMERS ON HELIUM DROPLETS, AND INTERPRETATION OF THEIR ELECTRONIC STRUCTURE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/33339

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Title: WIDE-RANGE VISIBLE SPECTROSCOPY OF HIGH-SPIN ALKALI TRIMERS ON HELIUM DROPLETS, AND INTERPRETATION OF THEIR ELECTRONIC STRUCTURE
Creators: Nagl, Johann; Hauser, Andreas W.; Aubock, Gerald; Allard, Olivier; Callegari, Carlo; Ernst, Wolfgang E.
Issue Date: 2008
Abstract: We use helium droplets to assemble all possible combinations of trimers of potassium and rubidium (K$_3$, K$_2$Rb, KRb$_2$, Rb$_3$) in a quartet-spin state, and we measure their electronic excitation spectra in the range 10600--17400~cm$^{-1}$. We use two methods to separate overlapping spectra: visible-visible V-type double-resonance and mass-selective beam depletion. We observe and assign the laser-induced-fluorescence spectra of ten new bands. Assignment is backed by high-level \textit{ab initio} calculations of the electronic levels structure of these molecules. Both experiment and calculations show highly regular patterns which we elucidate in terms of an electron-shell structure similar in spirit to that observed in Na clusters.} \textbf{52,} 2141 (1984).}
URI: http://hdl.handle.net/1811/33339
Other Identifiers: 2008-WH-11
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