How Do We Model Positronium in Quantum Mechanics?

[K.J.Healey]

Though very short lived, how do we view the couple? As a single electron shell, distant from the "nucleus"/positron. Are the energy levels the same as if you view it as a positron shell around an electron nucleus? Or do we just model it as a pair of charged particles in QM distribution about a central point.

 

[ZapperZ]

http://physicsworld.com/cws/article/news/17559

Zz.