Of course...
...but it'd be comparable to assembling the nukes and haulling them to orbit, but without all the protesting "concerned citizens"/nut-jobs. And a gravity slingshot around Jupiter could put the scoop into a counter-directional orbit without too much effort.
20 kilos is ~ 430 megatons TNT equivalent, the equivalent of 4.3 million 0.1 kiloton pulse units.
Adam