Comparision of Alpha Particles, Beta Particles And Gamma Rays


Alpha ($\alpha$) rays Beta ($\beta$) rays Gamma ($\gamma$) rays
Nature of radiation Helium Nucleus ($He^{2+}$) Electron ($e^{-}$) Electromagnetic radiation
Ionising Power High Low Very low
Penetrating Power Very low (Stopped by sheet of paper) Low (Stopped by thin sheet of aluminium) Very high (Reduced to half by 1 or 2 cm thick lead)
Effect of magnetic field Deflected with large radius

(Upwards when magnetic field is into page)

Deflected with small radius

(Downwards when magnetic field is into page)

No effect
Effect of electric field Attracted to – Attracted to + No effect


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