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 Title: HIGH RESOLUTION SPECTROSCOPY OF THE [18.0]2Π3/2 - X2Σ+ TRANSITION OF THORIUM NITRIDE, ThN Author(s): Le, Anh T. Contributor(s): Cheng, Lan; Steimle, Timothy; Nguyen, Duc-Trung Subject(s): Metal containing Abstract: Serious draw backs to nuclear power include long-term nuclear waste storage and amelioration of the existing waste. The 4\% enriched uranium fuel used in a typical light water reactor is converted to spent nuclear fuel (SNF) made up of 3\% fission products, of which $\sim$30\% are lanthanides (Ln), and 1\% transuranium actinide (Ac) elements Np, Pu, Am and Cm. Partitioning of the Ln from the Ac present in the SNF by developing element-specific ligands for solvent extraction is a one of the most challenging facet of nuclear waste processing.\footnote{Leoncini, A.; Huskens, J.; Verboom, W., Ligands for f-element extraction used in the nuclear fuel cycle. Chem. Soc. Rev. 2017, 46 (23), 7229-7273.} Systematic experimental and theoretical studies of simple Ac and Ln containing molecules is one avenue for garnering insight into element-specific ligation.\footnote{Heaven, M. C.; Barker, B. J.; Antonov, I. O., Spectroscopy and Structure of the Simplest Actinide Bonds. J. Phys. Chem. A 2014, 118 (46), 10867-10881.} As part of an effort to establish trends in Th-X bonding, a combined experimental and theoretical study of \chem{ThN} has been undertaken. High-resolution ($\sim$30MHz) LIF spectroscopy, both field-free and in the presence of static magnetic and electric fields, were recorded. A strong band near 555 nm, which was not previously detected via REMPI spectroscopy $^{b}$ has been assigned to a [18.0]$^{2}\Pi_{3/2}$ - $^{2}\Sigma^{+}$ transition. The determined fine structure parameters, electric dipole moments, and magnetic g-factors will be discussed in terms of the present, and previous$^{b}$, ab initio predictions. Issue Date: 06/20/18 Publisher: International Symposium on Molecular Spectroscopy Citation Info: APS Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/100680 DOI: 10.15278/isms.2018.WF08 Other Identifier(s): WF08 Date Available in IDEALS: 2018-08-172018-12-12
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