  We use the two-alpha cluster model to describe the properties of $^{8}$Be.
The $E2$-transitions in a two-body continuum can be described as bremsstrahlung
in an inelastic scattering process. We compute cross sections as functions of
initial energy for the possible $E2$-transitions from initial angular momenta
$(0^+,2^+,4^+,6^+,8^+)$. The dependence on the exact shape of potentials is
very small when the low-energy scattering phase-shifts are the same. We relate
to practical observables where energies of the emerging alpha-particles are
restricted in various ways. The unphysical infrared contribution is removed. We
find pronounced peaking for photon energies matching resonance positions.
Contributions from intra-band transitions are rather small although substantial
(and even dominating) for initial energies between resonances. Structure
information are derived but both ${\cal B}^{(E2)}$ values and electromagnetic
transition rates are ambiguous in the continuum.
