Geiger nuttal law.

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Geiger & nuttal measured the range of alpha particles emitted by several radioactive elements & found that there exists a regular relationship between the ranges & the half lives of the elements. The relationship is expressed as
     log10(λ)=A+Blog10(R)
Where, R=Range of alpha particles
            λ=disintegration constant
      A & B = constant
★ Geiger nuttal law in terms of energy
    log10(λ)=K+Clog10(E)
Where,E=energy of alpha particles
         K & C = constant
★ shorter half lives alpha particles have greater kinetic energy.while longer half lives alpha particles have lower kinetic energy.

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