
#1
Nov1909, 04:03 PM

P: 4

Anyone with the same experience?
we are going through this on the laboratory, we quiet dont know how to treat it but I want to be the first to figure it out... I know what it is but we need to solve how to make it stay on a normal radioactive rate before it goes critical (acourding to the drill of course). THX 



#2
Nov1909, 04:19 PM

Sci Advisor
P: 5,941





#3
Nov1909, 04:41 PM

P: 4

Halflife is the period of time, for a substance undergoing decay, to decrease by half. The name originally was used to describe a characteristic of unstable atoms (radioactive decay), but may apply to any quantity which follows a setrate decay.
The original term, dating to 1907, was "halflife period", which was later shortened to "halflife" sometime in the early 1950s.[1] Halflives are very often used to describe quantities undergoing exponential decay—for example radioactive decay—where the halflife is constant over the whole life of the decay, and is a characteristic unit (a natural unit of scale) for the exponential decay equation. However, a halflife can also be defined for nonexponential decay processes, although in these cases the halflife varies throughout the decay process. For a general introduction and description of exponential decay, see the article exponential decay. For a general introduction and description of nonexponential decay, see the article rate law. The converse of halflife is doubling time. The table at right shows the reduction of a quantity in terms of the number of halflives elapsed 


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