Template:Long-lived fission products

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Nuclide t12 Yield Decay
energy
[a 1]
Decay
mode
(Ma) (%)[a 2] (keV)
99Tc 0.211 6.1385 294 β
126Sn 0.230 0.1084 4050[a 3] βγ
79Se 0.327 0.0447 151 β
93Zr 1.53 5.4575 91 βγ
135Cs 2.3 6.9110[a 4] 269 β
107Pd 6.5 1.2499 33 β
129I 15.7 0.8410 194 βγ
  1. Decay energy is split among β, neutrino, and γ if any.
  2. Per 65 thermal-neutron fissions of U-235 and 35 of Pu-239.
  3. Has decay energy 380 keV,
    but decay product Sb-126 has decay energy 3.67 MeV.
  4. Lower in thermal reactor because predecessor absorbs neutrons.
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