Template:Long-lived fission products

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Nuclide t12 Yield Q[a 1] βγ
(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 235U and 35 of 239Pu.
  3. Has decay energy 380 keV, but its decay product 126Sb has decay energy 3.67 MeV.
  4. Lower in thermal reactors because 135Xe, its predecessor, readily absorbs neutrons.
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