that's not the most powerful deut bomb... try to increase the power by making a "spreader" bomb, one that spreads the deut around before exploding.

Set the temp of the deut to 10 Kelvin. It will come out compressed, but will warm up and expand. Some people set it to 0, but 10 seems optimal.

EDIT: Nevermind, hot deut works better for this bomb. Hot deut with the small bombs, but if you use more deut, try some cold.

Check out other deut bombs that others have created for some great ideas. Hope you enjoy The Powder Toy!

Check out my deut fuel-air bomb, it has the "spreader" effect like jallibad was saying AND it should be fully destructible

and you can change the life to compress it , higher life = more compressed BUT its doesnt lose mass :D

EDIT:

EDIT: There ive redeveloped the firing mech so that it is 100% destructible and smaller and more efficent :D

nice, and the reason for the instant-ish explosion is that for SOME reason when its a beam of neutrons and not a random burst it sets it off SO much faster , i think its becuase pretty much all the nuetrons pass over the same deut particles increasing the amount of "radiation" those particles get making them go off faster

and you HAVE to stick this over a city its AMAZING , or atleast my version waswhich has so much of a lesser payload in deut capacity so yours should be amazing :D