Mechanisms of positron annihilation on molecules

  title={Mechanisms of positron annihilation on molecules},
  author={Gleb F Gribakin},
The aim of this work is to identify the mechanisms responsible for very large rates and other peculiarities observed in low-energy positron annihilation on molecules. The two mechanisms considered are: (i) Direct annihilation of the incoming positron with one of the molecular electrons. This mechanism dominates for atoms and small molecules. I show that its contribution to the annihilation rate can be related to the positron elastic scattering cross section. This mechanism is characterized by… CONTINUE READING


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