Abstract
An atomic model of the physical nucleons is considered in which the structure is represented as a nucleon core surrounded by a pion cloud in a p 1 2 state, the system being in a state of isotopic spin 1 2 . From the pion wave function, constructed on this basis, the static properties of the physical nucleons—magnetic moments, charge distributions, mass difference—are derived and compared with observation. Modifications are considered which could bring the predictions of this model into better accord with the experiments. It is shown that the core must be given properties, both of size and of structure, which deviate considerably from those of the Dirac nucleons. Some discussion is given of the relationships of the atomic model to meson field theories.
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