A RELATIVISTIC AND GAUGE-INVARIANT MODEL OF NUCLEON-NUCLEON BREMSSTRAHLUNG

Nucleon-nucleon bremsstrahlung cross sections are calculated in the framework of the one-boson exchange model in a fully relativistic and gauge-in-variant manner. For coplanar and non-coplanar events and also for the Rochester geometry in the proton-proton as well as the proton-neutron case the agreement with the experimental data is excellent for energies above 30 MeV. A strong dependence of the neutron-proton bremsstrahlung cross sections on the polar angle and on the non-coplanarity has been found with interesting implications for future experiments. © 1969.