Abstract
The two-photon annihilation rate for positronium hydride is calculated with the use of extensive Hylleraas-type wave functions in which all six interparticle coordinates are used. The binding energy against dissociation into a positronium atom and a hydrogen atom is improved upon the previous best value by about 3.8%. The two-photon annihilation rate, calculated with a wave function that gives a positron-electron cusp value of -0.492 (compared with the exact value of -0.5), is determined as 2.459 .
- Received 13 February 1986
DOI:https://doi.org/10.1103/PhysRevA.34.609
©1986 American Physical Society