cobalt-60

In the past, cobalt-60, a gamma-emitting radioactive isotope, was used as a source of the radiation for food, which tainted the whole enterprise with scare words like "gamma" and "radioactive."

When Precaution Trumps Public Safety Matt Ridley 2011

In the past, cobalt-60, a gamma-emitting radioactive isotope, was used as a source of the radiation for food, which tainted the whole enterprise with scare words like "gamma" and "radioactive."

When Precaution Trumps Public Safety Matt Ridley 2011

After spending hundreds of thousands of dollars, officials determined that the source of the radiation was a "pencil-like cylinder" of radioactive cobalt-60, which was once part of a machine used to sterilize food and eventually made its way to a Saudi Arabian scrap metal yard, and then was inexplicably included in a shipment of more than 22-tons of copper wire.

8,000 Refrigerated Shipping Containers May Be In Danger Of Exploding 2011

Abandoned medical scanners, food processing devices and mining equipment containing radioactive metals such as cesium-137 and cobalt-60 are often picked up by scrap collectors and sold to recyclers, according to the International Atomic Energy Agency, the UN's nuclear arm.

Glowing Budweiser Dave Hurteau 2008

So are technetium-99, tritium, cobalt-60 as well as uranium, radium, thorium and many others.

Venom Joan Brady 2010

Iron-55 and cobalt-60 are highly radioactive, emitting gamma rays, but have short half-lives so that 50 years after closedown their hazard is much diminished.

Nuclear waste management 2009

Their atoms change into different isotopes such as iron-55, cobalt-60, nickel-63, and carbon-14.

Nuclear waste management 2009

For example, uranium-238 has 0.00015 curies of radioactivity per pound (0.15 millicuries), while cobalt-60 has nearly 518,000 curies per pound.

Radiation units 2009

External irradiation can be carried out using a gamma beam from a radioactive cobalt-60 source, though in developed countries the much more versatile linear accelerators are now being utilized as a high-energy x-ray source (gamma and x-rays are much the same).

Radioisotopes in medicine 2009

"Also found was literature on how to build 'dirty bombs' and information about cesium-137, strontium-90 and cobalt-60, radioactive materials," said the Bangor Daily.

Slain Trust fund millionaire James G. Cummings 'furious' over Obama's election, was making dirty bomb 2009