No, It would be a very unpleasent place to be (for about a second), then not so much.
The whole idea is the Enhanced Radiation Warhead is a prompt radiation wave of fast neutrons which sweeps through everything, armour, concrete, rocks, wood, flesh and delivers a lethal rad dose to anything living, leaving the area unradded and accessible to your followup troops to seize control.
It is totally not suitable for quarantining a region.
I always like the concept of the nutron bomb
Kill everything living and leave the realty intact ... return and clear the enemy corpses in a couple of days
it even kills roaches
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