Isotopes of Technetium
Notes
Technetium is one of three elements in the first 82 that have no stable isotopes. The other such elements are promethium and tungsten, although since the half-life of tungsten is so long (2.09x1019 y) tungsten is usually classed as being stable.
Notable Isotopes
95mTc [52 neutrons]
Abundance: synthetic
Half life: 61 days [ Electron Capture ]
Decay Energy: ? MeV
Decays to 95Mo.
Half life: 61 days [ Gamma Radiation ]
Decay Energy: 0.204, 0.582, 0.835 MeV
Decays to ?.
Half life: 61 days
Decay Energy: 0.0389e MeV
Decays to 95Tc.
96Tc [53 neutrons]
Abundance: synthetic
Half life: 4.3 days [ Electron Capture ]
Decay Energy: ? MeV
Decays to 96Mo.
Half life: 4.3 days [ Gamma Radiation ]
Decay Energy: 0.778, 0.849, 0.812 MeV
Decays to ?.
97mTc [54 neutrons]
Abundance: synthetic
Half life: 90 days
Decay Energy: 0.965e MeV
Decays to 97Tc.
97Tc [54 neutrons]
Abundance: synthetic
Half life: 2.6 x 106 years [ Electron Capture ]
Decay Energy: ? MeV
Decays to 97Mo.
98Tc [55 neutrons]
Abundance: synthetic
Half life: 4.2 x 106 years [ beta- ]
Decay Energy: 0.4 MeV
Decays to 98Ru.
Half life: 4.2 x 106 years [ Gamma Radiation ]
Decay Energy: 0.745, 0.652 MeV
Decays to .
99mTc [56 neutrons]
Abundance: trace
Half life: 6.01 hours
Decay Energy: 0.142, 0.002 MeV
Decays to 99Tc.
Half life: 6.01 hours [ Gamma Radiation ]
Decay Energy: 0.140 MeV
Decays to .
99Tc [56 neutrons]
Abundance: trace
Half life: 2.111 x 105 years [ beta- ]
Decay Energy: 0.294 MeV
Decays to 99Ru.