Although alpha, beta, and gamma radiations were most commonly found, other types of decay were eventually discovered. Shortly after the discovery of the positron in cosmic ray products, it was realized that the same process that operates in classical beta decay can also produce positrons (positron emission)
http://en.wikipedia.org/wiki/Radioactive_decay
Antimatter plasmas and antihydrogen
http://ttf2009.ucsd.edu/research/surkogroup/positron/papers/sr6.pdf
happy for you Swansont.
altough the thread starter post can be mistunderstood it has some point and sense to put under consideration.
You keep buggering me mate
I have right to reply and my post is relate to the thread