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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:2018-08-17
2018-12-12


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