Converting Half Life to Becquerels

[schumi]

Can you convert Half Life into Becquerels? How?

 

[mathman]

They are different kinds of units. Half-life is defined for a specific radionuclide, independent of how much. Becquerel depends on the total quantity of the material.

 

[Bill_K]

One Becquerel is one nuclear decay per second. The half-life t_½ is the time it takes half of the nuclei to decay. Related to t_½ is the decay constant: t_½ = ln(2)/λ. The significance of the decay constant λ is that it is the fractional rate per second at which nuclei are decaying:

dN/dt = - λ N

So if you multiply λ by the number of nuclei present, N, you'll get the number of decays per second, which is Becquerels.

 

[schumi]

Thank you, that made it clear.