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 Title: BONDING AT THE EXTREME. DETECTION AND CHARACTERIZATION OF THORIUM DIMER, Th2 Author(s): Steimle, Timothy Contributor(s): Kokkin, Damian L; Muscarella, Seth Subject(s): Metal containing Abstract: Due to the difficultly of working with actinides (radioactive, short lifetimes) and the number of electrons in these systems our chemical understanding either experimentally or theoretically on these systems is very limited. The electronic spectrum of thorium dimer, Th$_2$, is expected to be heavily congested due to the predicted twelve electronic states within an energy less then 1,eV of the calculated $^3Delta_g$ ground state. The chemical bond is predicted to be a quadruple bond in both the ground state and low lying $^1Sigma^+_g$ state (T$_e$=400,cm$^{-1}$)footnote{B.J. Roos, P.-{AA}. Malmqvist and L. Gagliardi, J. Am. Chem. Soc. 128, 17000-17006, 2006}. Experimentally Th$_2$ was been detected in the gas phase by mass spectrometryfootnote{M.C. Heaven, B.J. Barker and I.O. Antonov, J. Phys. Chem A. 118, 10867-10881, 2014}. Here we report on the detection of the gas fluorescence spectrum of Th$_2$ in the 495-560,nm range via application of 2D LIF spectroscopy and attempts to record high resolution field free and Zeeman spectra. Issue Date: 23-Jun-15 Publisher: International Symposium on Molecular Spectroscopy Citation Info: ACS Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/79388 Date Available in IDEALS: 2016-01-05
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