Students want to construct a scattering experiment using a powerful source of 5.5-MeV ∝ particles to scatter from a gold foil. They want to be able to count 1 particle/s at 50°, but their detector is limited to a maximum count rate of 2000 particles/s. Their detector subtends a small angle. Will their experiment work without modifying the detector if the other angle they want to measure is 6°? Explain
Students want to construct a scattering experiment using a powerful source of 5.5-MeV ∝ particles to scatter from a gold foil. They want to be able to count 1 particle/s at 50°, but their detector is limited to a maximum count rate of 2000 particles/s. Their detector subtends a small angle. Will their experiment work without modifying the detector if the other angle they want to measure is 6°? Explain
Number of particles scattered per unit area [N(θ)] is given by,
Here, No denotes the initial number of particles, n denotes the number of atoms per volume, t denotes the thickness of the target, K denotes the kinetic energy of the incident particle and z1, z2 are the atomic numbers.
Since no other variable in equation (i) changes other than the angle.
The ratio of the number of particles at angle 50o to the number of particles at 6o will be given as,
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