ABSTRACT
Sachs form factor A nucleus form factor. Namely, in the process of electron scattering on nuclei at energies of GeV (and beyond), de Broglie’s wavelength electron becomes smaller than the size of a nucleus. In such a case, instead of nuclear form factors, form factors of nucleons are used to describe scattering. Nucleons are particles with spin 1/2, and electrical and magnetic scattering contribute to the cross-section. For this problem, the form factors called Sachs form factors are more convenient than standard longitudinal and transversal form factors. Sachs form factors, at zero momentum, transfer from the electron to the nucleon (q = 0):
GE(0) = {
1 for a proton
0 for a neutron
GM(0) = { μp for a proton
μn for a neutron .
