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Europium Isotopes






Proton number: 63


Stable Isotopes


Europium stable isotope number 1: 151Eu
Neutrons: 88;
Abundance: 47.81%;
Jn: 5/2+;

Europium stable isotope number 2: 153Eu
Neutrons: 90;
Abundance: 52.19%;
Jn: 5/2+;

Natural Radioactive isotopes

There is no Europium Natural Radioactive isotopes known

Artificial Radioactive isotopes


Europium radioactive isotope number 1: 130Eu
Neutrons: 67;
Jn: 1+;
Decay: p;
t1/2: 0.0009s ≈ 0.90 ms;

Europium radioactive isotope number 2: 131Eu
Neutrons: 68;
Jn: 3/2+;
Decay: p : 89.00 %
ε : 11.00 %;
t1/2: 0.0178s ≈ 17.80 ms;

Europium radioactive isotope number 3: 132Eu
Neutrons: 69;
Jn: Unknown;
Decay: ε
p;
t1/2: 0.1s ;

Europium radioactive isotope number 4: 133Eu
Neutrons: 70;
Jn: Unknown;
Decay: ε ?;
t1/2: 1s ;

Europium radioactive isotope number 5: 134Eu
Neutrons: 71;
Jn: Unknown;
Decay: ε : 100.00 %
ε p > 0.00 %;
t1/2: 0.5s ;

Europium radioactive isotope number 6: 135Eu
Neutrons: 72;
Jn: Unknown;
Decay: ε : 100.00 %
ε p;
t1/2: 1.5s ;

Europium radioactive isotope number 7: 136Eu
Neutrons: 73;
Jn: 3+;
Decay: ε : 100.00 %;
t1/2: 3.8s ;

Europium radioactive isotope number 8: 136Eu
Neutrons: 73;
Jn: 7+;
Decay: ε : 100.00 %;
t1/2: 3.3s ;

Europium radioactive isotope number 9: 136Eu
Neutrons: 73;
Jn: 3+;
Decay: ε p : 0.09 %;
t1/2: 3.8s ;

Europium radioactive isotope number 10: 136Eu
Neutrons: 73;
Jn: 7+;
Decay: ε p : 0.09 %;
t1/2: 3.3s ;

Europium radioactive isotope number 11: 137Eu
Neutrons: 74;
Jn: 11/2-;
Decay: ε : 100.00 %;
t1/2: 11s ;

Europium radioactive isotope number 12: 138Eu
Neutrons: 75;
Jn: 6-;
Decay: ε : 100.00 %;
t1/2: 12.1s ;

Europium radioactive isotope number 13: 139Eu
Neutrons: 76;
Jn: 11/2-;
Decay: ε : 100.00 %;
t1/2: 17.9s ;

Europium radioactive isotope number 14: 140Eu
Neutrons: 77;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 1.51s ;

Europium radioactive isotope number 15: 140Eu
Neutrons: 77;
Jn: 5-;
Decay: IT : 100.00 %
ε < 1.00 %;
t1/2: 0.125s ;

Europium radioactive isotope number 16: 141Eu
Neutrons: 78;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 40.7s ;

Europium radioactive isotope number 17: 141Eu
Neutrons: 78;
Jn: 11/2-;
Decay: IT : 87.00 %
ε : 13.00 %;
t1/2: 2.7s ;

Europium radioactive isotope number 18: 142Eu
Neutrons: 79;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 2.34s ;

Europium radioactive isotope number 19: 142Eu
Neutrons: 79;
Jn: 8-;
Decay: ε : 100.00 %;
t1/2: 73.38s ;

Europium radioactive isotope number 20: 143Eu
Neutrons: 80;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 155.4s ≈ 2.59 m;

Europium radioactive isotope number 21: 144Eu
Neutrons: 81;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 10.2s ;

Europium radioactive isotope number 22: 145Eu
Neutrons: 82;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 512352s ≈ 5.93 d;

Europium radioactive isotope number 23: 146Eu
Neutrons: 83;
Jn: 4-;
Decay: ε : 100.00 %;
t1/2: 398304s ≈ 4.61 d;

Europium radioactive isotope number 24: 147Eu
Neutrons: 84;
Jn: 5/2+;
Decay: ε : 100.00 %
α : 2.2E-3 %;
t1/2: 2082240s ≈ 24.10 d;

Europium radioactive isotope number 25: 148Eu
Neutrons: 85;
Jn: 5-;
Decay: ε : 100.00 %
α : 9.4E-7 %;
t1/2: 4708800s ≈ 54.50 d;

Europium radioactive isotope number 26: 149Eu
Neutrons: 86;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 8043840s ≈ 93.10 d;

Europium radioactive isotope number 27: 150Eu
Neutrons: 87;
Jn: 5-;
Decay: ε : 100.00 %;
t1/2: 1163678000s ≈ 36.90 y;

Europium radioactive isotope number 28: 150Eu
Neutrons: 87;
Jn: 0-;
Decay: β - : 89.00 %
ε : 11.00 %
IT ≤ 5.0E-8 %;
t1/2: 46080s ≈ 12.80 h;

Europium radioactive isotope number 29: 152Eu
Neutrons: 89;
Jn: 3-;
Decay: ε : 72.10 %
β - : 27.90 %;
t1/2: 425925200s ≈ 13.51 y;

Europium radioactive isotope number 30: 152Eu
Neutrons: 89;
Jn: 0-;
Decay: β - : 72.00 %
ε : 28.00 %;
t1/2: 33521.76s ≈ 9.31 h;

Europium radioactive isotope number 31: 152Eu
Neutrons: 89;
Jn: 8-;
Decay: IT : 100.00 %;
t1/2: 5760s ≈ 1.60 h;

Europium radioactive isotope number 32: 154Eu
Neutrons: 91;
Jn: 3-;
Decay: β - : 99.98 %
ε : 0.02 %;
t1/2: 270894200s ≈ 8.59 y;

Europium radioactive isotope number 33: 154Eu
Neutrons: 91;
Jn: 8-;
Decay: IT : 100.00 %;
t1/2: 2778s ≈ 46.30 m;

Europium radioactive isotope number 34: 155Eu
Neutrons: 92;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 149890600s ≈ 4.75 y;

Europium radioactive isotope number 35: 156Eu
Neutrons: 93;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 1312416s ≈ 15.19 d;

Europium radioactive isotope number 36: 157Eu
Neutrons: 94;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 54648s ≈ 15.18 h;

Europium radioactive isotope number 37: 158Eu
Neutrons: 95;
Jn: 1-;
Decay: β - : 100.00 %;
t1/2: 2754s ≈ 45.90 m;

Europium radioactive isotope number 38: 159Eu
Neutrons: 96;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 1086s ≈ 18.10 m;

Europium radioactive isotope number 39: 160Eu
Neutrons: 97;
Jn: 1;
Decay: β - : 100.00 %;
t1/2: 38s ;

Europium radioactive isotope number 40: 161Eu
Neutrons: 98;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 26s ;

Europium radioactive isotope number 41: 162Eu
Neutrons: 99;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 10.6s ;

Europium radioactive isotope number 42: 163Eu
Neutrons: 100;
Jn: Unknown;
Decay: β - ?;
t1/2: 6s ;

Europium radioactive isotope number 43: 164Eu
Neutrons: 101;
Jn: Unknown;
Decay: β -;
t1/2: unknowns ;

Europium radioactive isotope number 44: 165Eu
Neutrons: 102;
Jn: Unknown;
Decay: β - ?;
t1/2: 1s ;

Europium radioactive isotope number 45: 166Eu
Neutrons: 103;
Jn: Unknown;
Decay: β -;
t1/2: 0.4s ;

Europium radioactive isotope number 46: 167Eu
Neutrons: 104;
Jn: Unknown;
Decay: β - ?;
t1/2: 0.2s ;
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