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Polonium-210 (210 Po, Po-210, historically radium F) is an isotope of polonium. It undergoes alpha decay to stable 206 Pb with a half-life of 138.376 days (about 4 + 1 ⁄ 2 months), the longest half-life of all naturally occurring polonium isotopes ( 210–218 Po). [ 1 ]
210 Po with a half-life of 138.376 days has the longest half-life of any naturally-occurring isotope of polonium and is the most common isotope of polonium. It is also the most easily synthesized polonium isotope. 209 Po, which does not occur naturally, has the longest half-life of all isotopes of polonium at 124 years.
Polonium-210 in tobacco contributes to many of the cases of lung cancer worldwide. Most of this polonium is derived from lead-210 deposited on tobacco leaves from the atmosphere; the lead-210 is a product of radon-222 gas, much of which appears to originate from the decay of radium-226 from fertilizers applied to the tobacco soils.
polonium-211m2: 243 radon-214m: 245 fluorine-31: 250 uranium-239m1 >250 bismuth-197m4: 253 fluorine-30: 260 nitrogen-25: 260 polonium-210m: 263 bismuth-197m3: 263 lead-204m1: 265 astatine-214m1: 265 radium-208m: 270 lead-196m4: 270 radon-214: 270 uranium-238m: 280 curium-245m: 290 thallium-192m2: 296 polonium-212: 299 protactinium-220m1: 308 ...
Decay Scheme of 210 Po. Here, to the left, we now have an alpha decay. It is the decay of the element Polonium [6] discovered by Marie Curie, with mass number 210. The isotope 210 Po is the penultimate member of the uranium-radium-decay series; it decays into a stable lead-isotope with a half-life of 138 days.
Scaramella tests positive for polonium-210 and is admitted into a hospital. Litvinenko's widow also tests positive for polonium-210, but was not sent to the hospital for treatment. 2 December: Scotland Yard's counter-terrorist unit have questioned Yuri Shvets, a former KGB spy who emigrated to the United States in 1993. He was questioned as a ...
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[2] [3] A small amount of polonium-210 (50 curies, 11 mg) was deposited in the grooves of the shell and on the central sphere: the layers of gold and nickel served to shield the beryllium from alpha particles emitted by the polonium. The whole urchin weighed about 7 grams and was attached to mounting brackets in a 2.5 cm diameter inner cavity ...