Swiss scientists have found evidence Arafat was poisoned: report | National Post
Was Yasser Arafat killed by radioactive polonium-210? - health - 04 July 2012 - New Scientist
The half-life of polonium-210 is 138 days, meaning the radioactivity of a sample drops by half during that period. Arafat died seven and a half years ago in November 2004. "That's something like 20 half-lives ago," says Regan. "Only one atom in a million of the original source would be left."But if his clothes have been contaminated by a natural source, it could have been continually replenished since then."They have to establish that the polonium is not associated with a natural occurring radioactive source," says Regan – perhaps by looking for other accompanying natural sources, such as lead-210, lead-214 or bismuth-214. Suha Arafat has now called for her late husband's body to be exhumed for further tests, a move which the Palestinian Authority has agreed to in principle, report Reuters.
It's Elemental - The Element Polonium
History and Uses:
Polonium was discovered by Marie Sklodowska Curie, a Polish chemist, in 1898. She obtained polonium from pitchblende, a material that contains uranium, after noticing that unrefined pitchblende was more radioactive than the uranium that was separated from it. She reasoned that pitchblende must contain at least one other radioactive element. Curie needed to refine several tons of pitchblende in order to obtain tiny amounts of polonium and radium, another radioactive element discovered by Curie. One ton of uranium ore contains only about 100 micrograms (0.0001 grams) of polonium.
Due to its scarcity, polonium is usually produced by bombarding bismuth-209 with neutrons in a nuclear reactor. This forms bismuth-210, which has a half-life of 5 days. Bismuth-210 decays into polonium-210 through beta decay. Milligram amounts of polonium-210 have been produced by this method.
Polonium-210 is a very strong emitter of alpha particles. A single gram of polonium-210 creates 140 Watts of heat energy and is being considered as a lightweight heat source for thermoelectric power for spacecraft. Polonium-210 has a half-life of 138.39 days.
Polonium's most stable isotope, polonium-209, has a half-life of 102 years. It decays into lead-205 through alpha decay. Polonium-209 is available from Oak Ridge National Laboratory at the cost of about $3200 per microcurie.
Polonium can be used to eliminate static electricity in machinery that is caused by processes such as the rolling of paper, wire or sheet metal, although other materials which emit beta particles are more commonly used for this purpose. Polonium is also used in brushes for removing dust from photographic films, although the polonium must be carefully sealed to protect the user from contamination. Polonium is also combined with beryllium to form neutron sources.