  We present measurements of differential cross sections and analyzing powers
for the elastic 2H(~d; d)d scattering process. The data were obtained using a
130 MeV polarized deuteron beam. Cross sections and spin observables of the
elastic scattering process were measured at the AGOR facility at KVI using two
independent setups, namely BINA and BBS. The data harvest at setups are in
excellent agreement with each other and allowed us to carry out a thorough
systematic analysis to provide the most accurate data in elastic
deuteron-deuteron scattering at intermediate energies. The results can be used
to confront upcoming state-of-the-art calculations in the four-nucleon
scattering domain, and will, thereby, provide further insights in the dynamics
of three- and four-nucleon forces in few-nucleon systems.
