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Summary form only given. Experiments have shown that the floating potential of a polonium 210 radioactive potential probe in air is a function of wind speed and direction. Polonium 210 decays by emitting 5.3-MeV alpha particles which have a range in STP air of about 3.8 cm. Each alpha particle creates about 105 electron-ion pairs in its wake. Within a microsecond of their creation, the free electrons...
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