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Uranium Isotopes






Proton number: 92


Stable Isotopes

There is no Uranium Stable isotopes known

Natural Radioactive isotopes


Uranium radioactive isotope number 1: 234U
Neutrons: 142;
Abundance: 0.0054%;
Jn: 0+;
Decay: α : 100.00 %
SF : 1.6E-9 %
Mg : 1E-11 %
Ne : 9E-12 %;
t1/2: 7.742088E+12s ≈ 2.455000e+5 y;

Uranium radioactive isotope number 2: 235U
Neutrons: 143;
Abundance: 0.7204%;
Jn: 7/2-;
Decay: α : 100.00 %
SF : 7.0E-9 %
Ne ~ 8.E-10 %
28Mg : 8.E-10 %;
t1/2: 2.220134E+16s ≈ 7.039999e+8 y;

Uranium radioactive isotope number 3: 238U
Neutrons: 146;
Abundance: 99.2742%;
Jn: 0+;
Decay: α : 100.00 %
SF : 5.5E-5 %;
t1/2: 1.409028E+17s ≈ 4.467998e+9 y;

Artificial Radioactive isotopes


Uranium radioactive isotope number 1: 217U
Neutrons: 125;
Jn: Unknown;
Decay: α ≤ 100.00 %;
t1/2: 0.016s ≈ 16.00 ms;

Uranium radioactive isotope number 2: 218U
Neutrons: 126;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 0.00051s ≈ 0.51 ms;

Uranium radioactive isotope number 3: 218U
Neutrons: 126;
Jn: 8+;
Decay: α ~ 100.00 %;
t1/2: 0.00056s ≈ 0.56 ms;

Uranium radioactive isotope number 4: 219U
Neutrons: 127;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 4.2E-05s ≈ 42.00 µs;

Uranium radioactive isotope number 5: 220U
Neutrons: 128;
Jn: 0+;
Decay: α ?
ε ?;
t1/2: 6E-08s ≈ 60.00 ns;

Uranium radioactive isotope number 6: 221U
Neutrons: 129;
Jn: Unknown;
Decay: ε ?
α ?;
t1/2: 7E-07s ≈ 0.70 µs;

Uranium radioactive isotope number 7: 222U
Neutrons: 130;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 1E-06s ≈ 1.00 µs;

Uranium radioactive isotope number 8: 223U
Neutrons: 131;
Jn: Unknown;
Decay: α : 100.00 %
ε : 0.20 %;
t1/2: 1.8E-05s ≈ 18.00 µs;

Uranium radioactive isotope number 9: 224U
Neutrons: 132;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 0.0009s ≈ 0.90 ms;

Uranium radioactive isotope number 10: 225U
Neutrons: 133;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.084s ≈ 84.00 ms;

Uranium radioactive isotope number 11: 226U
Neutrons: 134;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 0.26s ;

Uranium radioactive isotope number 12: 227U
Neutrons: 135;
Jn: 3/2+;
Decay: α : 100.00 %;
t1/2: 66s ;

Uranium radioactive isotope number 13: 228U
Neutrons: 136;
Jn: 0+;
Decay: α > 95.00 %
ε < 5.00 %;
t1/2: 546s ≈ 9.10 m;

Uranium radioactive isotope number 14: 229U
Neutrons: 137;
Jn: 3/2+;
Decay: ε ~ 80.00 %
α ~ 20.00 %;
t1/2: 3480s ≈ 58.00 m;

Uranium radioactive isotope number 15: 230U
Neutrons: 138;
Jn: 0+;
Decay: α : 100.00 %
SF < 1E-10 %;
t1/2: 1797120s ≈ 20.80 d;

Uranium radioactive isotope number 16: 231U
Neutrons: 139;
Jn: 5/2-;
Decay: ε : 100.00 %
α ~ 4.0E-3 %;
t1/2: 362880s ≈ 4.20 d;

Uranium radioactive isotope number 17: 232U
Neutrons: 140;
Jn: 0+;
Decay: α : 100.00 %
SF : 9E-20 %;
t1/2: 2172830000s ≈ 68.90 y;

Uranium radioactive isotope number 18: 233U
Neutrons: 141;
Jn: 5/2+;
Decay: α : 100.00 %
SF < 6.0E-9 %
24Ne : 9E-10 %
28Mg < 1.E-13 %;
t1/2: 5.020531E+12s ≈ 1.592000e+5 y;

Uranium radioactive isotope number 19: 235U
Neutrons: 143;
Jn: 1/2+;
Decay: IT : 100.00 %;
t1/2: 1560s ≈ 26.00 m;

Uranium radioactive isotope number 20: 236U
Neutrons: 144;
Jn: 0+;
Decay: α : 100.00 %
SF : 9.4E-8 %;
t1/2: 7.385731E+14s ≈ 2.342000e+7 y;

Uranium radioactive isotope number 21: 236U
Neutrons: 144;
Jn: 0+;
Decay: IT : 87.00 %
SF : 13.00 %
α < 10.00 %;
t1/2: 1.2E-07s ≈ 0.12 µs;

Uranium radioactive isotope number 22: 237U
Neutrons: 145;
Jn: 1/2+;
Decay: β - : 100.00 %;
t1/2: 583200s ≈ 6.75 d;

Uranium radioactive isotope number 23: 239U
Neutrons: 147;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 1407s ≈ 23.45 m;

Uranium radioactive isotope number 24: 240U
Neutrons: 148;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 50760s ≈ 14.10 h;

Uranium radioactive isotope number 25: 241U
Neutrons: 149;
Jn: Unknown;
Decay: β - ?;
t1/2: 300s ≈ 5.00 m;

Uranium radioactive isotope number 26: 242U
Neutrons: 150;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 1008s ≈ 16.80 m;
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