Positronium and Positron Reactions in Positron Radiation Spur

The study of positronium and positron reactions provides an alternative means to investigate hot radical reactions in the radiation spur. Positron and positronium react with radicals or others in the radiation spur created by the energetic positron itself. The positron may compete with other electron acceptors for electrons to form positronium. The positron also may be captured by a positron acceptor. The positronium formed may react with a radical or others to form a positronium compound. These reactions can be investigated by using the methods of positron annihilation, e.g. lifetime, angular correlation, and Doppler broadening measurements.