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For an alpha particle to cause an jonisation event, the alpha particle must lose energy. Suppose an alpha particle emitted by an unstable nucleus

For an alpha particle to cause an jonisation event, the alpha particle must lose energy. Suppose an alpha particle emitted by an unstable nucleus had 5.0 MeV of energy and it required about 30 eV to ionise an atom. Estimate how many ion pairs the alpha particle could produce.

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