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Samarium Isotopes

Proton number: 62

Stable Isotopes


Samarium stable isotope number 1: 144Sm
Neutrons: 82;
Abundance: 3.07%;
Jn: 0+;

Samarium stable isotope number 2: 149Sm
Neutrons: 87;
Abundance: 13.82%;
Jn: 7/2-;

Samarium stable isotope number 3: 150Sm
Neutrons: 88;
Abundance: 7.38%;
Jn: 0+;

Samarium stable isotope number 4: 152Sm
Neutrons: 90;
Abundance: 26.75%;
Jn: 0+;

Samarium stable isotope number 5: 154Sm
Neutrons: 92;
Abundance: 22.75%;
Jn: 0+;

Natural Radioactive isotopes


Samarium radioactive isotope number 1: 147Sm
Neutrons: 85;
Abundance: 14.99%;
Jn: 7/2-;
Decay: α : 100.00 %;
t1/2: 3.342816E+18s ≈ 1.060000e+11 y;

Samarium radioactive isotope number 2: 148Sm
Neutrons: 86;
Abundance: 11.24%;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 2.20752E+23s ≈ 7.000000e+15 y;

Artificial Radioactive isotopes


Samarium radioactive isotope number 1: 128Sm
Neutrons: 66;
Jn: 0+;
Decay: ε ?
p ?;
t1/2: 0.5s ;

Samarium radioactive isotope number 2: 129Sm
Neutrons: 67;
Jn: 1/2+;
Decay: ε
ε p;
t1/2: 0.55s ;

Samarium radioactive isotope number 3: 130Sm
Neutrons: 68;
Jn: 0+;
Decay: ε;
t1/2: 1s ;

Samarium radioactive isotope number 4: 131Sm
Neutrons: 69;
Jn: Unknown;
Decay: ε : 100.00 %
ε p > 0.00 %;
t1/2: 1.2s ;

Samarium radioactive isotope number 5: 132Sm
Neutrons: 70;
Jn: 0+;
Decay: ε : 100.00 %
ε p;
t1/2: 4s ;

Samarium radioactive isotope number 6: 133Sm
Neutrons: 71;
Jn: 5/2+;
Decay: ε : 100.00 %
ε p > 0.00 %;
t1/2: 3.7s ;

Samarium radioactive isotope number 7: 134Sm
Neutrons: 72;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 9.5s ;

Samarium radioactive isotope number 8: 135Sm
Neutrons: 73;
Jn: 3/2+,5/2+;
Decay: ε : 100.00 %
ε p : 0.02 %;
t1/2: 10.3s ;

Samarium radioactive isotope number 9: 136Sm
Neutrons: 74;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 47s ;

Samarium radioactive isotope number 10: 137Sm
Neutrons: 75;
Jn: 9/2-;
Decay: ε : 100.00 %;
t1/2: 45s ;

Samarium radioactive isotope number 11: 138Sm
Neutrons: 76;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 186s ≈ 3.10 m;

Samarium radioactive isotope number 12: 139Sm
Neutrons: 77;
Jn: 1/2+;
Decay: ε : 100.00 %;
t1/2: 154.2s ≈ 2.57 m;

Samarium radioactive isotope number 13: 139Sm
Neutrons: 77;
Jn: 11/2-;
Decay: IT : 93.70 %
ε : 6.30 %;
t1/2: 10.7s ;

Samarium radioactive isotope number 14: 140Sm
Neutrons: 78;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 889.2s ≈ 14.82 m;

Samarium radioactive isotope number 15: 141Sm
Neutrons: 79;
Jn: 1/2+;
Decay: ε : 100.00 %;
t1/2: 612s ≈ 10.20 m;

Samarium radioactive isotope number 16: 141Sm
Neutrons: 79;
Jn: 11/2-;
Decay: ε : 99.69 %
IT : 0.31 %;
t1/2: 1356s ≈ 22.60 m;

Samarium radioactive isotope number 17: 142Sm
Neutrons: 80;
Jn: 0+;
Decay: ε : 100.00 %;
t1/2: 4349.4s ≈ 1.21 h;

Samarium radioactive isotope number 18: 143Sm
Neutrons: 81;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 525s ≈ 8.75 m;

Samarium radioactive isotope number 19: 143Sm
Neutrons: 81;
Jn: 11/2-;
Decay: IT : 99.76 %
ε : 0.24 %;
t1/2: 66s ;

Samarium radioactive isotope number 20: 145Sm
Neutrons: 83;
Jn: 7/2-;
Decay: ε : 100.00 %;
t1/2: 29376000s ≈ 340.00 d;

Samarium radioactive isotope number 21: 146Sm
Neutrons: 84;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 3.248208E+15s ≈ 1.030000e+8 y;

Samarium radioactive isotope number 22: 151Sm
Neutrons: 89;
Jn: 5/2-;
Decay: β - : 100.00 %;
t1/2: 2838240000s ≈ 90.00 y;

Samarium radioactive isotope number 23: 153Sm
Neutrons: 91;
Jn: 3/2+;
Decay: β - : 100.00 %;
t1/2: 166622.4s ≈ 46.28 h;

Samarium radioactive isotope number 24: 153Sm
Neutrons: 91;
Jn: 11/2-;
Decay: IT : 100.00 %;
t1/2: 0.0106s ≈ 10.60 ms;

Samarium radioactive isotope number 25: 155Sm
Neutrons: 93;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 1338s ≈ 22.30 m;

Samarium radioactive isotope number 26: 156Sm
Neutrons: 94;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 33840s ≈ 9.40 h;

Samarium radioactive isotope number 27: 157Sm
Neutrons: 95;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 481.8s ≈ 8.03 m;

Samarium radioactive isotope number 28: 158Sm
Neutrons: 96;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 318s ≈ 5.30 m;

Samarium radioactive isotope number 29: 159Sm
Neutrons: 97;
Jn: 5/2-;
Decay: β - : 100.00 %;
t1/2: 11.37s ;

Samarium radioactive isotope number 30: 160Sm
Neutrons: 98;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 9.6s ;

Samarium radioactive isotope number 31: 161Sm
Neutrons: 99;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 4.8s ;

Samarium radioactive isotope number 32: 162Sm
Neutrons: 100;
Jn: 0+;
Decay: β - ?;
t1/2: 2s ;

Samarium radioactive isotope number 33: 163Sm
Neutrons: 101;
Jn: Unknown;
Decay: β - ?;
t1/2: 1s ;

Samarium radioactive isotope number 34: 164Sm
Neutrons: 102;
Jn: 0+;
Decay: β - ?;
t1/2: 0.5s ;

Samarium radioactive isotope number 35: 165Sm
Neutrons: 103;
Jn: Unknown;
Decay: β -;
t1/2: 0.2s ;

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