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arXiv · 1310.6450

Zeeman-tuned rotational level-crossing spectroscopy in a diatomic free radical

S. B. Cahn·J. Ammon·E. Kirilov·Y. V. Gurevich·D. Murphree·R. Paolino·D. A. Rahmlow·M. G. Kozlov·D. DeMille
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Abstract

Rotational levels of molecular free radicals can be tuned to degeneracy using laboratory-scale magnetic fields. Because of their intrinsically narrow width, these level crossings of opposite-parity states have been proposed for use in the study of parity-violating interactions and other applications. We experimentally study a typical manifestation of this system using $^{138}$BaF. Using a Stark-mixing method for detection, we demonstrate level-crossing signals with spectral width as small as 6 kHz. We use our data to verify the predicted lineshapes, transition dipole moments, and Stark shifts, and to precisely determine molecular magnetic g-factors. Our results constitute an initial proof-of-concept for use of this system to study nuclear spin-dependent parity violating effects.

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S. B. Cahn, J. Ammon, E. Kirilov, Y. V. Gurevich, D. Murphree, R. Paolino, D. A. Rahmlow, M. G. Kozlov, D. DeMille. 2014-03-11. Zeeman-tuned rotational level-crossing spectroscopy in a diatomic free radical. https://doi.org/10.1103/physrevlett.112.163002

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