0. Abstract

An Investigation of the effects of distance on the radioactivity of Americium-241


There are three types of Ionising radiation, Alpha, Beta and Gamma. This experiment focuses primarily on Alpha decay, the process where an Alpha particle(a helium nucleus) is lost. Our radioactive source is Americium-241, an isotope that undergoes mostly Alpha decay. Our experiment involves measuring the amount of radiation detected at certain intervals of distance. By analyzing how much radiation is lost at certain intervals, we can calculate the predict the amount of radiation at a certain distance through a constant. All experiments are conducted in the Physics lab and a Geiger Counter was used. We measured the radiation at intervals of 1mm. Results indicated that the amount of radiation decreased exponentially. Further  research can be done on how other factors such as temperature, magnetic fields or composition of the surrounding air affect radiation.

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