The nucleus of ${\mathrm{N}}^{15}$ has been investigated by the electron scattering technique at incident energies of 250 and 400 MeV. The first diffraction minimum has been observed and measured. The data have been analyzed by using two nuclear charge density distributions: the Fermi model and the shell model. A phase-shift program was used for the analysis. A value for the radius and skin thickness of the ${\mathrm{N}}^{15}$ nucleus is given, although the data do not fit the diffraction minimum. For the Fermi model, the rms radius is 2.7 F; the shell model yields 2.6 F.

• Received 15 August 1969

DOI:https://doi.org/10.1103/PhysRev.188.1590