Branching ratios and radiative lifetimes of the U, L, and i states of thorium oxide

Damian L. Kokkin, Timothy Steimle, David Demille

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19 Scopus citations

Abstract

The dispersed laser induced fluorescence resulting from excitation of the U(|Ω|=1)-X1Σ+(0,0), L(|Ω|=1)-X1Σ+(0,0), and I(|Ω|=1)-X1Σ+(0,0) bands near 398, 402, and 512 nm, respectively, of thorium oxide, ThO, has been recorded and analyzed. The branching ratios for the fluorescence decay from the U(|Ω|=1)(v=0), L(|Ω|=1)(v=0), and I(|Ω|=1)(v=0) states are determined. Radiative lifetimes of 57 ± 2, 17 ± 1, 115 ± 4, and 468 ± 30 ns for the U(|Ω|=1)(v=0), L(|Ω|=1)(v=0), I(|Ω|=1)(v=0), and C1Π1(v=0) states, respectively, were determined from the analysis of the fluorescence decay curves. Transition dipole moments for numerous bands involving the U(|Ω|=1)(v=0), L(|Ω|=1)(v=0), I(|Ω|=1)(v=0), and C1Π1(v=0) states are determined. Possible optical pumping and detection schemes are proposed for experiments using ThO to search for the electric dipole moment of the electron.

Original languageEnglish (US)
Article number062503
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume90
Issue number6
DOIs
StatePublished - Dec 4 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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