B About isomeric transitions at high Z

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I wonder why at high Z, isomeric transitions with small transition energies may be 100% converted.
 
I can be possible to reword the post. Thanks
 
EJIn said:
I wonder why at high Z, isomeric transitions with small transition energies may be 100% converted.

I believe that IT rate scales as the inverse of the excited state energy to some large power (E-5), as well as proportional to Z2, thus explaining both the enhancement for small small transition energies and high-Z isotopes
 

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