title        THREEBODY BREAKUP OF LASER-EXCITED TRIATOMIC HYDROGEN MOLECULES 
authors      U. M\"uller,  M. Beckert, M. Braun, and H. Helm 
affiliation  Fakult\"at f\"ur Physik, Universit\"at  Freiburg, 
              Hermann-Herder-Str. 3, D-79104 Freiburg 
summary  
  We investigate the laser-photofragmentation of H3 molecules in a fast-beam 
  experiment. Neutral fragments are detected in coincidence by a time- and 
  position-sensitive multihit-detector. The decay into H+H2 is analyzed and 
  the results are compared to  quantum molecular dynamics calculation. Triple 
  coincidences from breakup into three H(1s) fragments have been detected for 
  the first time.  We find strong correlations in the  six-fold differential 
  cross section of the fragment momentum vectors.