Carbon 13, for one

Usage examples of isotope.

An isotope discovered only four years earlier, called U-235 or actinouranium, could conceivably fire off in a self-sustaining explosion of incalculable magnitude.

Neither Hiro nor Eliot ever mentions, or even notices, the by-now-obvious fact that Fisheye is traveling with a small, self-contained nuclear power source - almost certainly radiothermal isotopes like the ones that power the Rat Thing.

This is where the geochemists come in, for the isotopes accumulate at different rates depending on how much oxygen or carbon dioxide is in the atmosphere at the time of their creation.

The thermoelectric nuclear isotope power generation used in some spacecraft would not work because the molten-iron environment is already hotter than the decaying radioactive isotope.

It could also export energy, in synthetic transuranium isotopes or pure radiation.

If the fuel melted, if the isotopes and transuranium elements fused, if the metals went critical and he remained within a mile of the complex, he would never feel the flash that vaporized him.

This had cost the Shaper economy many gigawatts of precious energy and tons of rare metals and isotopes.

Apparently such a use of stabilized isotopes had never occurred to the Corviki.

A lot of my own time is taken up with money, an almost obsessive issue for most British-based researchers these days: how to find the funds for the salaries of the post-docs, the grants to the students, the capital costs of new equipment, the consumable budget to buy the isotopes and the reagents.

PyrE is a solid solution of transplutonian isotopes, releasing thermonuclear energy on the order of stellar Phoenix action.

Certain isotopes lost radioactivity very rapidly, in a matter of hours or minutes.

Oppy and Groves droned on about problems of the isolation of isotopes and allotropic states of plutonium, Joe wondered why he had gone to bed with Mrs Augustino.

A blast smudge showed on the desert floor where a practice blast, a mere 100 tons of TNT spiced with isotopes, had been set off on V-E Day.

You never gave me any restrictions to observe in entertaining the Hokas, so this mess tonight is your fault, and it was Miss Hostrup and I who pulled your isotopes out of the pile.

Isotope 114m was an exceedingly intense gammaray emitter, and it was yet to be determined whether the DU casings would be adequate in keeping the deadly radiation contained.