4. Scattering processes

4.1 General considerations

4.2 Cross section

4.3 Fermi‘s golden rule

4.4 Feynman diagrams

Momentum, kinetic energy and reduced wavelength

Feynman graphs (Povh..., Particles & nuclei)

5. Geometrical shape of the nucleus

5.1 Kinematics of electron scattering

5.2 Rutherford scattering cross section

5.3 The form factor

5.4 Mott scattering

5.5 Nuclear charge distributions and radii

(Povh, ..., T&K)

Energy of electrons scattered by a nucleus,as a function of scattering angle

Form factors (Povh..., Particles & nuclei)

Helicity suppression of electron backscattering

820 MeV

Electron spectrometer MAMI – B at the Mainz microtron

(Povh, ..., P & N)

12 m

Differential Cross section for electron scattering from 12C:

(Povh, ..., P & N)

Differential cross section for electron scattering from 40Ca and 48Ca:

(*10)

(:10)

(Povh, ..., P & N)

Nuclear charge density nucleon (number)density

(Bopp, Kerne...)

(Segrè, Nuclei & particles)

500 MeV Electrons: 10 meV neutrons:

atomic nuclei macromolecules (a few 10-15 m) (a few 10-9 m)

ILL annual report 1996 (soft matter) www.ill.fr