Rotation properties of multipole moments in atomic sublevel spectroscopy.
The spatial orientation of atomic multipole moments can be observed optically with resonant polarized light. We demonstrate the procedure in the ground state of atomic sodium, using optical pumping to polarize the angular momentum substates. We show how the resulting information can be used to distinguish among signal contributions originating from different multipole moments.
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Suter
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Marty
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Klepel