  The theoretical cross section for Compton scattering of maximally entangled
Bell photons has yet to be rigorously confirmed by experiments. Test cases of
Bell states for use in Compton scattering experiments can now be expanded given
reports of creating all 4 Bell states in the hard X-ray regime by the process
of spontaneous parametric down-conversion. We outline an experiment and apply a
matrix method to parameterize Compton scattering theory using the phase
matching angles. When the azimuths of two hypothetical photon counters are
recorded at angles of 0 degrees and 90 degrees, and the ratio of their counting
rates determined, azimuthal ratios are expected to be 600 times larger compared
to 511 keV Bell photons.
