Detection of the Thorium Dimer via Two-Dimensional Fluorescence Spectroscopy

Timothy Steimle, Damian L. Kokkin, Seth Muscarella, Tongmei Ma

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Thorium dimer, Th<inf>2</inf>, has been detected in the gas phase via two-dimensional laser-induced fluorescence electronic spectroscopy. The visible excitation spectra are broad, unstructured features with an approximate line width of 10 cm<sup>-1</sup>. The spectrum consists of vibrational progressions associated with excitation from the ground electronic state to two different excited electronic states. The dispersed fluorescence was analyzed to give ground state vibrational constants ω<inf>e</inf> = 134.86 ± 0.66 cm<sup>-1</sup> and ω<inf>e</inf>x<inf>e</inf> = 0.50 ± 0.04 cm<sup>-1</sup>. Vibrational constants ω<inf>e</inf> = 169 ± 3 and 212 ± 2 cm<sup>-1</sup> were determined for the two excited electronic states. The radiative lifetimes were measured. A comparison with theoretical predictions is given. (Figure Presented).

Original languageEnglish (US)
Pages (from-to)9281-9285
Number of pages5
JournalJournal of Physical Chemistry A
Volume119
Issue number35
DOIs
StatePublished - Sep 3 2015

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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