From the field equation in ~b of the author's general-relativistic scalar field theory in the complex Weyl space an infinite set of Yukawa type equations, representing potential fields, arising from zero rest mass particles is obtained. The simplest of these equations is solved and is used in a nucleon model as the origin of a gravitationally stabilized nucleon. This procedure leads directly to an expression that predicts the representative nucleon radius of 1.21 fm.