Calculate the fraction per square mm area of 7.7MeV alpha particle scattered at 45degrees from a gold foil of thickness 2.1 * 10^-7m at a distance of 1.0cm from the target.
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Calculate the fraction per square mm area of 7.7MeV alpha particle scattered at 45degrees from a gold foil of thickness 2.1 * 10^-7m at a distance of 1.0cm from the target.
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