Nucleus-Nucleus Bremsstrahlung from Ultrarelativistic Collisions
  The bremsstrahlung produced when heavy nuclei collide is estimated for central collisions at the Relativistic Heavy Ion Collider. Soft photons can be used to infer the rapidity distribution of the outgoing charge. An experimental design is outlined. 
Sangyong Jeon, Joseph Kapusta, Alexei Chikanian, Jack Sandweiss