The "deactivated" antimatter was probably not "reactivated" once the dampening field was removed since they also comment on the energy sources of the Doomsday Machine being "deactivated" in the same context.
Mmmm, you could be right. Technically, though, and this would apply to Scotty's original comment, antimatter can't be "deactivated" -- either it is antimatter or it is not. To "deativate" it permanently would mean converting it to matter. Whether this is something the doomsday machine's field could have done is a matter of conjecture.
97 megatons isn't that huge of a blast though when it comes to space weapons but probably was enough combined with shrapnel from the Constellation to cause enough internal damage to shut down the Doomsday Machine.
I beg to differ. Read up on something called "Tsar Bomba" -- the largest fusion bomb ever detonated on Earth. Just the fireball was 5 miles wide, and almost reached the altitude of the bomber that dropped it. Some statistics:
- The mushroom cloud was 40 miles high (into the mesosphere) and 25 miles wide
- Villages as far away as 34 miles were completely obliterated (including brick structures)
- Third-degree burns could be caused 62 miles away
- The heat pulse was felt 170 miles away
- The shock wave was VISIBLE IN THE AIR 430 miles away
- Windows were broken 560 miles away
- The fireball was visible 630 miles away
- The shock wave went completely around the Earth 3 times, and was still measurable on the third pass
- The estimated yield was 50 megatons, making the power output at the peak of fusion about 5.4 septillion watts, or about 1.4% of the output of our Sun.
All this from an explosion approximately HALF that of the Constellation's impulse engines. I think the blast would have been pretty big even as space weapons are concerned...