If you want a realistic TPT, modify it yourself. It's open source.
lol
Actually, we do have an antimatter-equivilent explosion. It's either max-life DEUT explosion, max-tmp2 EXOT explosion, or max-tmp SING explosion. :P
Max-life DEUT, touching even a single neutron, immediately hits the particle cap for the game, so much that the inner particles exploding produce no neutrons at all. It produces a characteristic O-ring. :P
Max-tmp2 EXOT explodes into an invisible superheated WARP gas that always produces lots of pressure relative to its local pressure, and is always at maximum temperature, that lasts until its life runs out (which is aout 1000 frames)
And probably the closest to this, max-tmp SING is a black substance that, especially if turned into lava, simply reacts by touching anything that isn't extremely hot by exploding with the force of a few dozen thunder, spilling out hydrogen along with a bunch of other radiation.