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B What is the meaning of decay mode IT in nuclear physics ?

  1. Feb 9, 2017 #1
    I showed beta decay in decay mode of Nuclear chart..but I couldn't find what is the meaning if IT 100%..
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  3. Feb 9, 2017 #2


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    Could you point out an example for us ?
  4. Feb 9, 2017 #3


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    IT = Isomeric Transition. It indicates decay of a long lived nuclear state (an isomer) via a gamma or internal conversion.
  5. Feb 9, 2017 #4
    IT refers to isomeric transition. It is the decay of a nuclear isomer an excited state of a nucleus that has an unusually long half -life. A great example is Tc99m in which the first excited state of Tc99 has an energy of 0.141 MeV and a half-life of 6.02 hrs. The m stands for metastable.
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