Hi, Suppose that an anti-proton annihilates a proton. If any of the resultant particles have a negative charge, and are capable of converting another proton into an anti-proton, then in dense matter, the result may be chain reaction that ends up converting all matter into gamma rays.
Perhaps this is the origin of "gamma ray bursters". Some poor race, looking for a new energy source ends up instantly converting their entire planet into a burst of gamma rays, going out with a bang, and alerting the rest of the galaxy to the fact that they once existed. Motto:- Be very careful, it may just be a matter of doing enough conversions at once to act as the match that sets off the powder keg. Regards, Robin van Spaandonk local asymmetry = temporary success