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Cerium Isotopes






Proton number: 58


Stable Isotopes


Cerium stable isotope number 1: 140Ce
Neutrons: 82;
Abundance: 88.45%;
Jn: 0+;

Natural Radioactive isotopes


Cerium radioactive isotope number 1: 136Ce
Neutrons: 78;
Abundance: 0.185%;
Jn: 0+;
Decay: 2ε;
t1/2: 2.20752E+21s ≈ 7.000000e+13 y;

Cerium radioactive isotope number 2: 138Ce
Neutrons: 80;
Abundance: 0.251%;
Jn: 0+;
Decay: 2ε : 100.00 %;
t1/2: 2.83824E+21s ≈ 9.000000e+13 y;

Cerium radioactive isotope number 3: 142Ce
Neutrons: 84;
Abundance: 11.114%;
Jn: 0+;
Decay: 2β -;
t1/2: 8.19936E+24s ≈ 2.600000e+17 y;

Artificial Radioactive isotopes


Cerium radioactive isotope number 1: 119Ce
Neutrons: 61;
Jn: Unknown;
Decay: ε ?;
t1/2: 0.2s ;

Cerium radioactive isotope number 2: 120Ce
Neutrons: 62;
Jn: 0+;
Decay: ε ?;
t1/2: 0.25s ;

Cerium radioactive isotope number 3: 121Ce
Neutrons: 63;
Jn: Unknown;
Decay: ε : 100.00 %
ε p ~ 1.00 %;
t1/2: 1.1s ;

Cerium radioactive isotope number 4: 122Ce
Neutrons: 64;
Jn: 0+;
Decay: ε p ?
ε ?;
t1/2: 2s ;

Cerium radioactive isotope number 5: 123Ce
Neutrons: 65;
Jn: 5/2;
Decay: ε : 100.00 %
ε p > 0.00 %;
t1/2: 3.8s ;

Cerium radioactive isotope number 6: 124Ce
Neutrons: 66;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 6s ;

Cerium radioactive isotope number 7: 125Ce
Neutrons: 67;
Jn: 5/2+;
Decay: ε : 100.00 %
ε p;
t1/2: 10.2s ;

Cerium radioactive isotope number 8: 126Ce
Neutrons: 68;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 51s ;

Cerium radioactive isotope number 9: 127Ce
Neutrons: 69;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 31s ;

Cerium radioactive isotope number 10: 128Ce
Neutrons: 70;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 235.8s ≈ 3.93 m;

Cerium radioactive isotope number 11: 129Ce
Neutrons: 71;
Jn: 5/2+;
Decay: ε > 0.00 %;
t1/2: 210s ≈ 3.50 m;

Cerium radioactive isotope number 12: 130Ce
Neutrons: 72;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 1374s ≈ 22.90 m;

Cerium radioactive isotope number 13: 131Ce
Neutrons: 73;
Jn: 7/2+;
Decay: ε : 100.00 %;
t1/2: 618s ≈ 10.30 m;

Cerium radioactive isotope number 14: 131Ce
Neutrons: 73;
Jn: 1/2+;
Decay: ε : 100.00 %;
t1/2: 324s ≈ 5.40 m;

Cerium radioactive isotope number 15: 132Ce
Neutrons: 74;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 12636s ≈ 3.51 h;

Cerium radioactive isotope number 16: 132Ce
Neutrons: 74;
Jn: 8-;
Decay: IT : 100.00 %;
t1/2: 0.0094s ≈ 9.40 ms;

Cerium radioactive isotope number 17: 133Ce
Neutrons: 75;
Jn: 1/2+;
Decay: ε : 100.00 %;
t1/2: 5820s ≈ 1.62 h;

Cerium radioactive isotope number 18: 133Ce
Neutrons: 75;
Jn: 9/2-;
Decay: ε : 100.00 %;
t1/2: 17640s ≈ 4.90 h;

Cerium radioactive isotope number 19: 134Ce
Neutrons: 76;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 273024s ≈ 3.16 d;

Cerium radioactive isotope number 20: 135Ce
Neutrons: 77;
Jn: 1/2+;
Decay: ε : 100.00 %;
t1/2: 63720s ≈ 17.70 h;

Cerium radioactive isotope number 21: 135Ce
Neutrons: 77;
Jn: 11/2-;
Decay: IT : 100.00 %;
t1/2: 20s ;

Cerium radioactive isotope number 22: 136Ce
Neutrons: 78;
Jn: 10+;
Decay: IT : 100.00 %;
t1/2: 2.2E-06s ≈ 2.20 µs;

Cerium radioactive isotope number 23: 137Ce
Neutrons: 79;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 32400s ≈ 9.00 h;

Cerium radioactive isotope number 24: 137Ce
Neutrons: 79;
Jn: 11/2-;
Decay: IT : 99.22 %
ε : 0.78 %;
t1/2: 123840s ≈ 34.40 h;

Cerium radioactive isotope number 25: 139Ce
Neutrons: 81;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 11892180s ≈ 137.64 d;

Cerium radioactive isotope number 26: 139Ce
Neutrons: 81;
Jn: 11/2-;
Decay: IT : 100.00 %;
t1/2: 54.8s ;

Cerium radioactive isotope number 27: 141Ce
Neutrons: 83;
Jn: 7/2-;
Decay: β - : 100.00 %;
t1/2: 2808691s ≈ 32.51 d;

Cerium radioactive isotope number 28: 143Ce
Neutrons: 85;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 118940.4s ≈ 33.04 h;

Cerium radioactive isotope number 29: 144Ce
Neutrons: 86;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 24616220s ≈ 284.91 d;

Cerium radioactive isotope number 30: 145Ce
Neutrons: 87;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 180.6s ≈ 3.01 m;

Cerium radioactive isotope number 31: 146Ce
Neutrons: 88;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 811.2s ≈ 13.52 m;

Cerium radioactive isotope number 32: 147Ce
Neutrons: 89;
Jn: 5/2-;
Decay: β - : 100.00 %;
t1/2: 56.4s ;

Cerium radioactive isotope number 33: 148Ce
Neutrons: 90;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 56s ;

Cerium radioactive isotope number 34: 149Ce
Neutrons: 91;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 5.3s ;

Cerium radioactive isotope number 35: 150Ce
Neutrons: 92;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 4s ;

Cerium radioactive isotope number 36: 151Ce
Neutrons: 93;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 1.02s ;

Cerium radioactive isotope number 37: 152Ce
Neutrons: 94;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 1.4s ;

Cerium radioactive isotope number 38: 153Ce
Neutrons: 95;
Jn: Unknown;
Decay: β - ?;
t1/2: 1E-07s ≈ 0.10 µs;

Cerium radioactive isotope number 39: 154Ce
Neutrons: 96;
Jn: 0+;
Decay: β - ?;
t1/2: 1.5E-07s ≈ 0.15 µs;

Cerium radioactive isotope number 40: 155Ce
Neutrons: 97;
Jn: Unknown;
Decay: β - ?;
t1/2: 3E-07s ≈ 0.30 µs;

Cerium radioactive isotope number 41: 156Ce
Neutrons: 98;
Jn: 0+;
Decay: β - ?;
t1/2: 0.15s ;

Cerium radioactive isotope number 42: 157Ce
Neutrons: 99;
Jn: Unknown;
Decay: β - ?;
t1/2: 0.05s ≈ 50.00 ms;
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