Next Generation of Radiation-free Atomic Bombs

I read an informal discussion on the topic of scientific developments of radiation-free nuclear bombs. Everyone knows about the neutron bomb and its retirement by the first Bush administration after the end of the cold war. I did not know that research continued on the development of radiation free hydrogen bombs however.

Evidently atomic bombs have a jacket that can absorbs neutrons usually, and it is simple enough to design warheads to produce low radiation or make them full of gamma, beta and alpha rad.

With a next generation of high yield,low rad atomic bombs I suppose that very hardened opposition force secret research facilities very powerful below the ground locations will be within range of termination. It is interesting and concerning that atomic weapons can be commonly made to not make long-lasting radiation upon detonation. That may tempt some future war planners to use them in a critical circumstance.