# Energy from proton and antiproton

1. Dec 20, 2005

### newbie7.07

Is there a set wavelength for photons produced from antimatter reacting its matter equivalent, and if there is, what wavelength does a proton and antiproton reacting create?

2. Dec 20, 2005

### ahrkron

Staff Emeritus
There is no fixed wavelength for this, since it depends on the total energy of the original particles, which can be much larger than their mass-energy equivalent.

3. Dec 22, 2005

### Astronuc

Staff Emeritus
I seem to remember most $p\bar{p}$ reactions yielded cascades of mesons, with high sufficiently high energy protons producing baryonic resonances (hyperons) which decayed to protons and mesons, or pi-meson cascades. The mesons (charged pions) would decay to muons, which would decay to electrons, and I am leaving out the various neutrinos and anti-neutrinos.

Also, pions can interact with protons and neutrons producing Kaons and other baryonic resonances.

Generally, gamma rays are associated with $\pi^o$ decay and positron annihilation.