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Published online by Cambridge University Press: 24 October 2008
The interaction between an external electromagnetic field and a nucleus, including its exchange meson field, has recently been investigated by several authors (1). The interaction between a vector potential A and a nucleus has been found to be expressible in terms of the electric and magnetic multipole moments of the latter. It is the object of this note to discuss the corresponding interaction with a scalar potential V, and its connexion with previous results.