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Reading the answers to the question How do we know neutrons have no charge? I started a search for the electric dipole moment of atoms.

About molecules ist is clear, in some molecules an electron comes under the influence of a neighbor atom and we observe an electric dipole. My search for atomic electric dipoles was not successful.

Was an electric dipole ever observed. if yes, I’m curious how such a measurement should be carried out in a way, not inducing such a moment from the measurement instrument.

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Atoms in an external electric field acquire an electric dipole moment. This explains the observed Stark effect.

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  • $\begingroup$ I’m curious how such a measurement should be carried out in a way, not inducing such a moment from the measurement instrument. $\endgroup$ – HolgerFiedler Sep 25 '19 at 5:16

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