Internal Conversion Coefficient/Decay % HELP

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The discussion focuses on calculating the internal conversion coefficient (ICC) for the decay of 123I to 123Te. It highlights that 97.7% of disintegrations involve electron capture, leading to an excited state of 123Te, which subsequently emits gamma rays in 82.9% of those cases. The confusion arises regarding the correct percentages to use for the ICC calculation, specifically whether to apply the decay percentages of electron capture and gamma emission directly. The correct approach emphasizes that the ICC should be based solely on the decay of tellurium, not iodine. Clarification on the formula and the role of fluorescence yield is also sought.
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"In 97.7% of disintegrations 123I decays by electron capture to an excited state of 123Te, which has an energy of 159keV. Gamma rays of energy 159keV are emitted following 82.9% of decays. What's the internal conversion coefficient for this de-excitation?"


I know that a=Ne/Ny(gamma), but I'm kind of confused here about the percentage of the decays of the e- capture & gamma emission. Is it 97.7%/17.1%=5.713?

Any help would be greatly appreciated!
 
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gamma emmission 82.9%
rest x-ray emmission + flrorascence yeild

so icc = (17.1/82.9)/ (florascence yeild)

the 97% is just the percentage of time iodine decays through electron capture, we are interested only in tellurium decay!.

This is for now my understanding
 

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