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Terbium Isotopes






Proton number: 65


Stable Isotopes


Terbium stable isotope number 1: 159Tb
Neutrons: 94;
Abundance: 100%;
Jn: 3/2+;

Natural Radioactive isotopes

There is no Terbium Natural Radioactive isotopes known

Artificial Radioactive isotopes


Terbium radioactive isotope number 1: 135Tb
Neutrons: 70;
Jn: 7/2-;
Decay: p : 100.00 %;
t1/2: 0.00094s ≈ 0.94 ms;

Terbium radioactive isotope number 2: 136Tb
Neutrons: 71;
Jn: Unknown;
Decay: ε ?;
t1/2: 0.2s ;

Terbium radioactive isotope number 3: 137Tb
Neutrons: 72;
Jn: Unknown;
Decay: ε ?
p ?;
t1/2: 0.6s ;

Terbium radioactive isotope number 4: 138Tb
Neutrons: 73;
Jn: Unknown;
Decay: ε : 100.00 %
p;
t1/2: 2E-07s ≈ 0.20 µs;

Terbium radioactive isotope number 5: 139Tb
Neutrons: 74;
Jn: Unknown;
Decay: ε
ε p ?;
t1/2: 1.6s ;

Terbium radioactive isotope number 6: 140Tb
Neutrons: 75;
Jn: 7+;
Decay: ε : 100.00 %
ε p : 0.26 %;
t1/2: 2.1s ;

Terbium radioactive isotope number 7: 141Tb
Neutrons: 76;
Jn: 5/2-;
Decay: ε : 100.00 %;
t1/2: 3.5s ;

Terbium radioactive isotope number 8: 141Tb
Neutrons: 76;
Jn: Unknown;
Decay: ε : 100.00 %;
t1/2: 7.9s ;

Terbium radioactive isotope number 9: 142Tb
Neutrons: 77;
Jn: 1+;
Decay: ε : 100.00 %
ε p : 2.2E-3 %;
t1/2: 0.597s ;

Terbium radioactive isotope number 10: 142Tb
Neutrons: 77;
Jn: 5-;
Decay: IT : 100.00 %;
t1/2: 0.303s ;

Terbium radioactive isotope number 11: 143Tb
Neutrons: 78;
Jn: 11/2-;
Decay: ε : 100.00 %;
t1/2: 12s ;

Terbium radioactive isotope number 12: 143Tb
Neutrons: 78;
Jn: Unknown;
Decay: ε ;
t1/2: 21s ;

Terbium radioactive isotope number 13: 144Tb
Neutrons: 79;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 1s ;

Terbium radioactive isotope number 14: 144Tb
Neutrons: 79;
Jn: 6-;
Decay: IT : 66.00 %
ε : 34.00 %;
t1/2: 4.25s ;

Terbium radioactive isotope number 15: 145Tb
Neutrons: 80;
Jn: 3/2+;
Decay: ε ?;
t1/2: 1200s ≈ 20.00 m;

Terbium radioactive isotope number 16: 145Tb
Neutrons: 80;
Jn: 11/2-;
Decay: ε : 100.00 %;
t1/2: 30.9s ;

Terbium radioactive isotope number 17: 146Tb
Neutrons: 81;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 8s ;

Terbium radioactive isotope number 18: 146Tb
Neutrons: 81;
Jn: 5-;
Decay: ε : 100.00 %;
t1/2: 23s ;

Terbium radioactive isotope number 19: 147Tb
Neutrons: 82;
Jn: 1/2+;
Decay: ε : 100.00 %;
t1/2: 6120s ≈ 1.70 h;

Terbium radioactive isotope number 20: 147Tb
Neutrons: 82;
Jn: 11/2-;
Decay: ε : 100.00 %;
t1/2: 109.8s ;

Terbium radioactive isotope number 21: 148Tb
Neutrons: 83;
Jn: 2-;
Decay: ε : 100.00 %;
t1/2: 3600s ≈ 1.00 h;

Terbium radioactive isotope number 22: 148Tb
Neutrons: 83;
Jn: 9+;
Decay: ε : 100.00 %;
t1/2: 132s ≈ 2.20 m;

Terbium radioactive isotope number 23: 149Tb
Neutrons: 84;
Jn: 1/2+;
Decay: ε : 83.30 %
α : 16.70 %;
t1/2: 14824.8s ≈ 4.12 h;

Terbium radioactive isotope number 24: 149Tb
Neutrons: 84;
Jn: 11/2-;
Decay: ε : 99.98 %
α : 0.02 %;
t1/2: 249.6s ≈ 4.16 m;

Terbium radioactive isotope number 25: 150Tb
Neutrons: 85;
Jn: 2-;
Decay: ε : 100.00 %
α < 0.05 %;
t1/2: 12528s ≈ 3.48 h;

Terbium radioactive isotope number 26: 150Tb
Neutrons: 85;
Jn: 9+;
Decay: ε : 100.00 %;
t1/2: 348s ≈ 5.80 m;

Terbium radioactive isotope number 27: 151Tb
Neutrons: 86;
Jn: 1/2+;
Decay: ε : 100.00 %
α : 9.5E-3 %;
t1/2: 63392.4s ≈ 17.61 h;

Terbium radioactive isotope number 28: 151Tb
Neutrons: 86;
Jn: 11/2-;
Decay: IT : 93.80 %
ε : 6.20 %;
t1/2: 25s ;

Terbium radioactive isotope number 29: 152Tb
Neutrons: 87;
Jn: 2-;
Decay: ε : 100.00 %
α < 7.0E-7 %;
t1/2: 63000s ≈ 17.50 h;

Terbium radioactive isotope number 30: 152Tb
Neutrons: 87;
Jn: 8+;
Decay: IT : 78.80 %
ε : 21.20 %;
t1/2: 252s ≈ 4.20 m;

Terbium radioactive isotope number 31: 153Tb
Neutrons: 88;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 202176s ≈ 2.34 d;

Terbium radioactive isotope number 32: 153Tb
Neutrons: 88;
Jn: 11/2-;
Decay: IT : 100.00 %;
t1/2: 0.000186s ≈ 0.19 ms;

Terbium radioactive isotope number 33: 154Tb
Neutrons: 89;
Jn: 0;
Decay: ε : 100.00 %
β - < 0.10 %;
t1/2: 77400s ≈ 21.50 h;

Terbium radioactive isotope number 34: 154Tb
Neutrons: 89;
Jn: 7-;
Decay: ε : 98.20 %
IT : 1.80 %;
t1/2: 81720s ≈ 22.70 h;

Terbium radioactive isotope number 35: 154Tb
Neutrons: 89;
Jn: 3-;
Decay: ε : 78.20 %
IT : 21.80 %
β - < 0.10 %;
t1/2: 33840s ≈ 9.40 h;

Terbium radioactive isotope number 36: 155Tb
Neutrons: 90;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 459648s ≈ 5.32 d;

Terbium radioactive isotope number 37: 156Tb
Neutrons: 91;
Jn: 3-;
Decay: ε : 100.00 %;
t1/2: 462240s ≈ 5.35 d;

Terbium radioactive isotope number 38: 156Tb
Neutrons: 91;
Jn: 7-;
Decay: IT : 100.00 %;
t1/2: 87840s ≈ 24.40 h;

Terbium radioactive isotope number 39: 156Tb
Neutrons: 91;
Jn: 0+;
Decay: IT < 100.00 % ε > 0.00 %;
t1/2: 19080s ≈ 5.30 h;

Terbium radioactive isotope number 40: 157Tb
Neutrons: 92;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 2239056000s ≈ 71.00 y;

Terbium radioactive isotope number 41: 158Tb
Neutrons: 93;
Jn: 3-;
Decay: ε : 83.40 %
β - : 16.60 %;
t1/2: 5676480000s ≈ 180.00 y;

Terbium radioactive isotope number 42: 158Tb
Neutrons: 93;
Jn: 0-;
Decay: IT : 100.00 %
β - < 0.60 %
ε < 0.01 %;
t1/2: 10.7s ;

Terbium radioactive isotope number 43: 160Tb
Neutrons: 95;
Jn: 3-;
Decay: β - : 100.00 %;
t1/2: 6246720s ≈ 72.30 d;

Terbium radioactive isotope number 44: 161Tb
Neutrons: 96;
Jn: 3/2+;
Decay: β - : 100.00 %;
t1/2: 596678.4s ≈ 6.91 d;

Terbium radioactive isotope number 45: 162Tb
Neutrons: 97;
Jn: 1-;
Decay: β - : 100.00 %;
t1/2: 456s ≈ 7.60 m;

Terbium radioactive isotope number 46: 163Tb
Neutrons: 98;
Jn: 3/2+;
Decay: β - : 100.00 %;
t1/2: 1170s ≈ 19.50 m;

Terbium radioactive isotope number 47: 164Tb
Neutrons: 99;
Jn: 5+;
Decay: β - : 100.00 %;
t1/2: 180s ≈ 3.00 m;

Terbium radioactive isotope number 48: 165Tb
Neutrons: 100;
Jn: 3/2+;
Decay: β - : 100.00 %;
t1/2: 126.6s ≈ 2.11 m;

Terbium radioactive isotope number 49: 166Tb
Neutrons: 101;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 21s ;

Terbium radioactive isotope number 50: 167Tb
Neutrons: 102;
Jn: 3/2+;
Decay: β - : 100.00 %;
t1/2: 19.4s ;

Terbium radioactive isotope number 51: 168Tb
Neutrons: 103;
Jn: 4-;
Decay: β - : 100.00 %;
t1/2: 8.2s ;

Terbium radioactive isotope number 52: 169Tb
Neutrons: 104;
Jn: Unknown;
Decay: β - ?;
t1/2: 2s ;

Terbium radioactive isotope number 53: 170Tb
Neutrons: 105;
Jn: Unknown;
Decay: β - ?;
t1/2: 3s ;

Terbium radioactive isotope number 54: 171Tb
Neutrons: 106;
Jn: Unknown;
Decay: β -;
t1/2: 0.5s ;
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