Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Internal Conversion Coefficient/Decay % HELP

  1. Sep 18, 2012 #1


    User Avatar

    "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!
  2. jcsd
  3. Oct 29, 2012 #2
    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
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook