Atom bomb that produces lethal neutrons with less blast WordNet 3.0 & Open English WordNet

A neutron bomb, officially defined as a type of enhanced radiation weapon, is a low-yield thermonuclear weapon designed to maximize lethal neutron radiation in the immediate vicinity of the blast while minimizing the physical power of the blast itself. Wikipedia

Low yield thermonuclear weapon Wikidata

An atomic bomb that produces a greater amount of neutrons, and a lesser amount of blast; the intention being to create equal lethal neutron radiation and blast radii which increases the effectiveness of the weapon against armour while reducing collateral damage. Wiktionary

Atomic bomb that produces a greater amount of neutrons. Wiktionary (translation)