Simultaneous Heavy Ion Dissociation at Ultrarelativistic Energies
  We study the simultaneous dissociation of heavy ultrarelativistic nuclei followed by the forward-backward neutron emission in peripheral collisions at colliders. The main contribution to this particular heavy-ion dissociation process, which can be used as a beam luminosity monitor, is expected to be due to the electromagnetic interaction. The Weizsacker-Williams method is extended to the case of simultaneous excitation of collision partners which is simulated by the RELDIS code. A contribution to the dissociation cross section due to grazing nuclear interactions is estimated within the abrasion model and found to be relatively small. 
I.A. Pshenichnov (INR, Moscow), J.P. Bondorf (Bohr Inst.), S. Masetti   (Bologna, ENEA), I.N. Mishustin (Bohr Inst.), A. Ven...