Dne 10/30/2014 v 12:49 AM napsal(a):

If you bombarded a ball of bizmuth with positrons what would happen would it explode or transmute?

There would be ongoing anihilation of electrons.
It would soon start acctract electrons from other matter.
There can happen lighning discharge, leading to explosion.
The same can happen, if you bombard isolated matter by electrons.

--
Poutnik