Internal Conversion Coefficient/Decay % HELP

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The internal conversion coefficient (ICC) for the de-excitation of 123Te following the decay of 123I is calculated using the formula ICC = (17.1/82.9) / (fluorescence yield). In this context, 123I decays by electron capture in 97.7% of cases, leading to gamma emissions in 82.9% of those decays. The confusion arises from differentiating between the decay percentages of iodine and the subsequent emissions from tellurium. The correct approach focuses solely on the tellurium decay process.

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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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