Abstract
When subjected to a magnetic field, the magnetic sublevels of a rovibrational level can split apart and shift via what’s known as the ”Zeeman effect.” The magnitude of this shift can be related to the interaction of different types of angular momentum within the molecule, and can be a helpful tool for gaining more information about a molecule’s structure.
We present detailed measurements of the linear Zeeman shifts for the majority of all observed levels in88Sr2, most of which are made at the percent level or better. Fascinatingly, we observe certain rovibrational levels whose linear Zeeman shifts hew extremely closely to the values derived under the ideal Hund’s case (c) approximation, and others which dramatically differ from this approximation. The fact that we can see both ideal and non-ideal behavior within the same molecule is explained as a consequence of whether or not Coriolis coupling with nearby levels is allowed or forbidden for different combinations of quantum numbers.
We also present tables of quadratic (and higher order) Zeeman shifts, and derive mathematical explanations for why the magnitude of the quadratic Zeeman shift increases approximately with the bond length to the power of \(\frac {5}{2}\).
Finally, we describe the configuration of our magnetic Helmholtz coils, and show observable consequences of the 5 mV quantization of our DAQ-supplied control voltage.
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McDonald, M. (2018). Measurements of Zeeman Shifts. In: High Precision Optical Spectroscopy and Quantum State Selected Photodissociation of Ultracold 88Sr2 Molecules in an Optical Lattice. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-68735-3_4
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DOI: https://doi.org/10.1007/978-3-319-68735-3_4
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