CBSE Class 12 Physics Notes: Atoms & Nuclei – Mean Life

A very significant quantity that can be measured directly for small numbers of atoms is the mean lifetime. If there are n active nuclei, (atoms) (of the same type, of course), the mean life is

8. Where |dN| is the number of nuclei decaying between t, t + dt; the modulus sign is required to ensure that it is positive.

Illustration 1: Cascade Decays: Frequently, a nucleus A decays into another nucleus B, which again decays into C, and so on until the series ends in a stable nuclide. These are known as cascade decays. We will consider a simple example of a cascade decay where a nuclide a decays into B, and then, B decays into C:

« Previous Next »

Click Here to Go Back to CBSE Class 12 Physics Atoms & Nuclei All Topic Notes

Click Here for CBSE Class 12 Physics All Chapters Notes

If you have any query regarding this topic please post your queries HERE

Stay Updated!

Get all updates and information in your Inbox. Enter your email below: