Free Positronium
 
Ps in 6.0 a.u. cavity
Ps in 5.0 a.u. cavity
Ps in 4.0 a.u. cavity
|
-0.25000 (theory)
-0.242 +- 0.004 (calculated)
-0.163 +- 0.008 (calculated)
-0.073 +- 0.011 (calculated)
ionized!
|
As the cavity sqeezes positronium, the energy rises.
At 4.0 a.u., the cavity is so small that the electron and positron can
no longer behave as positronium ... they ionize, and the energy becomes
positive.