Correlated forward-backward dissociation and neutron spectra as a   luminosity monitor in heavy ion colliders
  Detection in zero degree calorimeters of the correlated forward-backward Coulomb or nuclear dissociation of two colliding nuclei is presented as a practical luminosity monitor in heavy ion colliders. Complementary predictions are given for total correlated Coulomb plus nuclear dissociation and for correlated forward-backward single neutrons from the giant dipole peak. 
Anthony J. Baltz, Chellis Chasman, and Sebastian N. White (BNL)