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alpha rays
... consist of particles which are Helium nucleii. They are charged positive and
can be deflected by electric and magnetic fields. Their exit speed is about
beta rays
... consist of electrons of different speed between 108m/s and 0.999c0. Because
of their negative charge, they are deflected…

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Beta particles have a medium penetrating power they are stopped by a
sheet of aluminium or plastics such as perspex.
Beta particles ionise atoms that they pass, but not as strongly as alpha
particles do.

Alpha particles are made of 2 protons and 2 neutrons.
This means that they have…


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