Unfortunately, key technologies like centrifuges to enrich uranium for bombs release little detectable radiation.

Upon neutron capture, the compound nucleus emits more easily detectable radiation, for example an alpha particle, which is then detected.

Tracking ships at long range was difficult, for they didn't emit much detectable radiation.

The premises were contaminated with up to 2 Sv h of detectable radiation.

Slant found no evidence of life; there were no lights on the nightside, no radio emanations, no detectable electromagnetic radiation at all.

No detectable radiation, no large masses of metal either above or below ground, no stored energy.

"No detectable emotional radiation, friend Conway," reported the empath.

There's no detectable radiation, sir.

If there was no light or other detectable radiation from the dark age, what was there to see?

As far as astrophysicists can tell, less than 1 percent of the mass of the universe has revealed itself through visible light and other detectable radiations.