A gold foil (p = 19.3 g/cm³, M = 197 g/ thickness of 2.0 x 104 cm. It is used to particles of kinetic energy 8.0 MeV. (a) W of the alpha particles is scattered at angles 90° (b) What fraction of the alpha particle

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A gold foil (p= 19.3 g/cm³, M = 197 g/mole) has a
thickness of 2.0 x 10-4 cm. It is used to scatter alpha
particles of kinetic energy 8.0 MeV. (a) What fraction
of the alpha particles is scattered at angles greater than
90°? (b) What fraction of the alpha particles is scattered
at angles between 90° and 45°?
Transcribed Image Text:A gold foil (p= 19.3 g/cm³, M = 197 g/mole) has a thickness of 2.0 x 10-4 cm. It is used to scatter alpha particles of kinetic energy 8.0 MeV. (a) What fraction of the alpha particles is scattered at angles greater than 90°? (b) What fraction of the alpha particles is scattered at angles between 90° and 45°?
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