Americium-241

Americium-241 is a source of alpha particles, and when alpha particles collide with the beryllium in the stone (emerald is a variety of the mineral beryl Be3Al2 (SiO3) 6), it produces neutrons.

Archive 2009-04-01 Gordon McCabe 2009

Then Kutz and his associates doctored the license to increase the amount of radioactive material they could buy, and began placing orders for nuclear moisture-density machines, which contain Cesium-137 and Americium-241.

Anatomy of a Nuclear Sting 2007

We removed those and wrote two paragraphs in that basically gave us more of an unlimited quantity of Cesium-137 and Americium-241 that we could buy.

Anatomy of a Nuclear Sting 2007

These long-lived radioisotopes, including Plutonium-239 and Americium-241, which would contaminate our air, soil, water and food supplies if they became airborne, are likely contaminants in the soils at the Divine Strake ground-zero.

Stairway to Divine Strake 2006

Americium-241 decays more slowly than plutonium-238, potentially allowing for longer missions, says Ralph McNutt of Johns Hopkins University in Baltimore, Maryland, who co-authored a report on the plutonium-238 shortage in the US.

New Scientist - Online News 2010

Contained in a piece of metal scrap, the radioactive isotope Americium-241 slipped into White Salvage's scrap-metal supply at its Ripley, Tenn., plant, blending into a new batch of aluminum.

The Greenpeace weblog 2009