BLACK HOLES

Neutron stars turn into black holes by incomplete annihilation which is incomplete combustion which means atoms collapse being partially annihilated.
Because the electrons and protons are not quite the same mass and not quite in the same state at the same time.
The result is the neutron star collapses to form a black hole rather than explodes to form a supernova.
You must be able to use Diracs equation and supergravity to determine the outcome.
The 60's theory of evolution for old times sake physics no longer accepts this theory of the big crunch when it used to be the evolutionary explaination for the big bang..............
If all the atoms were to be annihilated in a neutron star infinite energy would be produced.And the earth and other habitable planets would all be destroyed by gamma radiation - double fried.