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Introduction

This summer we are working in computational physics, which means we are using computer programs (in Fortran 90) to model how particles behave, not playing with actual particles.

We have been modeling positronium, which is formed from an electron and a positron. A positron is just like an electron, except it has a positive charge ... it is the anti-matter twin of the electron. Positronium is like the hydrogen atom, with a positron replacing the proton.