Neutron activation
Using neutron bombs to stop an enemy armored attack by rapidly incapacitating crews with a dose of 80+ Gy of radiation would require exploding large numbers of them to blanket the enemy forces, destroying all normal civilian buildings within c.600 meters of the immediate area. Neutron activation from the explosions could make many building materials in the city radioactive, such as galvanized steel (see area denial use below).