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 Title: Microwave Frequency Transitions Requiring Laser Ablated Uranium Metal Discovered Using Chirp-pulse Fourier Transform Spectroscopy Author(s): Cooke, S.A. Contributor(s): Long, B.E. Subject(s): Metal containing Abstract: A rod of depleted uranium metal (mp = 1,132$^{\circ}$ C) has been ablated with the fundamental operating frequency of a Nd:YAG laser. The resulting ablation plume of uranium was then mixed with argon gas and expanded between the transmit/receive horn antennae of a chirp-pulse Fourier transform microwave spectrometer. The recorded spectra show nine strong transitions which are not present when the laser is not used in the experimental procedure. A series of experiments in which the backing gas conditions were altered provides evidence that the nine observed transitions are carried by the same species. Should the transitions be from one species it is most likely an asymmetric top. The transitions persist even when ultra-pure argon is used as the sole backing gas. The oxide coating of the uranium metal likely provides a source of oxygen and, presently, the top" candidate for the unknown molecule is UO$_3$, which is known to have C$_2v$ symmetry. Double resonance experiments are planned to aid transition assignments. A plausible explanation for an elusive assignment to date is the presence of pseudo-rotation. Issue Date: 2014-06-17 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Cooke, S.A.; Long, B.E. MICROWAVE FREQUENCY TRANSITIONS REQUIRING LASER ABLATED URANIUM METAL DISCOVERED USING CHIRP-PULSE FOURIER TRANSFORM SPECTROSCOPY. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.TK14 Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/51203 DOI: 10.15278/isms.2014.TK14 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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