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arXiv · 1702.02548

Hyperfine Structure of the $B^3Π_1$ State and Predictions of Optical Cycling Behavior in the $X\rightarrow B$ transition of TlF

Eric B. Norrgard·Eustace R. Edwards·Daniel J. McCarron·Matthew H. Steinecker·David DeMille·Shah Saad Alam·Stephen K. Peck·Neha S. Wadia·Larry R. Hunter
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Abstract

The rotational and hyperfine spectrum of the $X^1Σ^+ \rightarrow B^3Π_1$ transition in TlF molecules was measured using laser-induced fluorescence from both a thermal and a cryogenic molecular beam. Rotational and hyperfine constants for the $B$ state are obtained. The large magnetic hyperfine interaction of the Tl nuclear spin leads to significant mixing of the lowest $B$ state rotational levels. Updated, more precise measurements of the $B\rightarrow X$ vibrational branching fractions are also presented. The combined rovibrational branching fractions allow for the prediction of the number of photons that can be scattered in a given TlF optical cycling scheme.

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Eric B. Norrgard, Eustace R. Edwards, Daniel J. McCarron, Matthew H. Steinecker, David DeMille, Shah Saad Alam, Stephen K. Peck, Neha S. Wadia, Larry R. Hunter. 2017-02-14. Hyperfine Structure of the $B^3Π_1$ State and Predictions of Optical Cycling Behavior in the $X\rightarrow B$ transition of TlF. https://doi.org/10.1103/physreva.95.062506

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