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Lanthanum Isotopes






Proton number: 57


Stable Isotopes


Lanthanum stable isotope number 1: 139La
Neutrons: 82;
Abundance: 99.91%;
Jn: 7/2+;

Natural Radioactive isotopes


Lanthanum radioactive isotope number 1: 138La
Neutrons: 81;
Abundance: 0.09%;
Jn: 5+;
Decay: ε : 65.60 %
β - : 34.40 %;
t1/2: 3.216672E+18s ≈ 1.020000e+11 y;

Artificial Radioactive isotopes


Lanthanum radioactive isotope number 1: 117La
Neutrons: 60;
Jn: 3/2+,3/2-;
Decay: p : 93.90 %
ε : 6.10 %;
t1/2: 0.0235s ≈ 23.50 ms;

Lanthanum radioactive isotope number 2: 117La
Neutrons: 60;
Jn: 9/2+;
Decay: p : 97.40 %
ε : 2.60 %;
t1/2: 0.01s ≈ 10.00 ms;

Lanthanum radioactive isotope number 3: 118La
Neutrons: 61;
Jn: Unknown;
Decay: ε ?;
t1/2: 1s ;

Lanthanum radioactive isotope number 4: 119La
Neutrons: 62;
Jn: Unknown;
Decay: ε ?;
t1/2: 2s ;

Lanthanum radioactive isotope number 5: 120La
Neutrons: 63;
Jn: Unknown;
Decay: ε : 100.00 %
ε p > 0.00 %;
t1/2: 2.8s ;

Lanthanum radioactive isotope number 6: 121La
Neutrons: 64;
Jn: Unknown;
Decay: ε : 100.00 %;
t1/2: 5.3s ;

Lanthanum radioactive isotope number 7: 122La
Neutrons: 65;
Jn: Unknown;
Decay: ε : 100.00 %
ε p;
t1/2: 8.6s ;

Lanthanum radioactive isotope number 8: 123La
Neutrons: 66;
Jn: Unknown;
Decay: ε : 100.00 %;
t1/2: 17s ;

Lanthanum radioactive isotope number 9: 124La
Neutrons: 67;
Jn: 7,8-;
Decay: ε : 100.00 %;
t1/2: 29s ;

Lanthanum radioactive isotope number 10: 124La
Neutrons: 67;
Jn: low;
Decay: ε : 100.00 %;
t1/2: 1s ;

Lanthanum radioactive isotope number 11: 125La
Neutrons: 68;
Jn: Unknown;
Decay: ε : 100.00 %;
t1/2: 64.8s ;

Lanthanum radioactive isotope number 12: 125La
Neutrons: 68;
Jn: Unknown;
Decay: IT ;
t1/2: 0.4s ;

Lanthanum radioactive isotope number 13: 126La
Neutrons: 69;
Jn: 5+;
Decay: ε > 0.00 %;
t1/2: 54s ;

Lanthanum radioactive isotope number 14: 126La
Neutrons: 69;
Jn: 0-,1,2-;
Decay: ε
IT;
t1/2: 50s ;

Lanthanum radioactive isotope number 15: 127La
Neutrons: 70;
Jn: 11/2-;
Decay: ε : 100.00 %;
t1/2: 306s ≈ 5.10 m;

Lanthanum radioactive isotope number 16: 127La
Neutrons: 70;
Jn: 3/2+;
Decay: ε : 100.00 %
IT;
t1/2: 222s ≈ 3.70 m;

Lanthanum radioactive isotope number 17: 128La
Neutrons: 71;
Jn: 5+;
Decay: ε : 100.00 %;
t1/2: 310.8s ≈ 5.18 m;

Lanthanum radioactive isotope number 18: 128La
Neutrons: 71;
Jn: 1+,2-;
Decay: ε : 100.00 %;
t1/2: 84s ;

Lanthanum radioactive isotope number 19: 129La
Neutrons: 72;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 696s ≈ 11.60 m;

Lanthanum radioactive isotope number 20: 129La
Neutrons: 72;
Jn: 11/2-;
Decay: IT : 100.00 %;
t1/2: 0.56s ;

Lanthanum radioactive isotope number 21: 130La
Neutrons: 73;
Jn: 3+;
Decay: ε : 100.00 %;
t1/2: 522s ≈ 8.70 m;

Lanthanum radioactive isotope number 22: 131La
Neutrons: 74;
Jn: 3/2+;
Decay: ε : 100.00 %;
t1/2: 3540s ≈ 59.00 m;

Lanthanum radioactive isotope number 23: 131La
Neutrons: 74;
Jn: 11/2-;
Decay: IT : 100.00 %;
t1/2: 0.00017s ≈ 0.17 ms;

Lanthanum radioactive isotope number 24: 132La
Neutrons: 75;
Jn: 2-;
Decay: ε : 100.00 %;
t1/2: 17280s ≈ 4.80 h;

Lanthanum radioactive isotope number 25: 132La
Neutrons: 75;
Jn: 6-;
Decay: IT : 76.00 %
ε : 24.00 %;
t1/2: 1458s ≈ 24.30 m;

Lanthanum radioactive isotope number 26: 133La
Neutrons: 76;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 14083.2s ≈ 3.91 h;

Lanthanum radioactive isotope number 27: 134La
Neutrons: 77;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 387s ≈ 6.45 m;

Lanthanum radioactive isotope number 28: 135La
Neutrons: 78;
Jn: 5/2+;
Decay: ε : 100.00 %;
t1/2: 70200s ≈ 19.50 h;

Lanthanum radioactive isotope number 29: 136La
Neutrons: 79;
Jn: 1+;
Decay: ε : 100.00 %;
t1/2: 592.2s ≈ 9.87 m;

Lanthanum radioactive isotope number 30: 136La
Neutrons: 79;
Jn: 8+;
Decay: IT : 100.00 %;
t1/2: 0.114s ;

Lanthanum radioactive isotope number 31: 137La
Neutrons: 80;
Jn: 7/2+;
Decay: ε : 100.00 %;
t1/2: 1.89216E+12s ≈ 6.000000e+4 y;

Lanthanum radioactive isotope number 32: 140La
Neutrons: 83;
Jn: 3-;
Decay: β - : 100.00 %;
t1/2: 144987.8s ≈ 40.27 h;

Lanthanum radioactive isotope number 33: 141La
Neutrons: 84;
Jn: 7/2+;
Decay: β - : 100.00 %;
t1/2: 14112s ≈ 3.92 h;

Lanthanum radioactive isotope number 34: 142La
Neutrons: 85;
Jn: 2-;
Decay: β - : 100.00 %;
t1/2: 5466s ≈ 1.52 h;

Lanthanum radioactive isotope number 35: 143La
Neutrons: 86;
Jn: 7/2+;
Decay: β - : 100.00 %;
t1/2: 852s ≈ 14.20 m;

Lanthanum radioactive isotope number 36: 144La
Neutrons: 87;
Jn: 3-;
Decay: β - : 100.00 %;
t1/2: 40.8s ;

Lanthanum radioactive isotope number 37: 145La
Neutrons: 88;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 24.8s ;

Lanthanum radioactive isotope number 38: 146La
Neutrons: 89;
Jn: 2-;
Decay: β - : 100.00 %;
t1/2: 6.27s ;

Lanthanum radioactive isotope number 39: 146La
Neutrons: 89;
Jn: 6-;
Decay: β - : 100.00 %;
t1/2: 10s ;

Lanthanum radioactive isotope number 40: 147La
Neutrons: 90;
Jn: 5/2+;
Decay: β - : 100.00 %
β -n : 0.04 %;
t1/2: 4.015s ;

Lanthanum radioactive isotope number 41: 148La
Neutrons: 91;
Jn: 2-;
Decay: β - : 100.00 %
β -n : 0.15 %;
t1/2: 1.26s ;

Lanthanum radioactive isotope number 42: 149La
Neutrons: 92;
Jn: 3/2,5/2;
Decay: β - : 100.00 %
β -n : 1.43 %;
t1/2: 1.05s ;

Lanthanum radioactive isotope number 43: 150La
Neutrons: 93;
Jn: 3-;
Decay: β - : 100.00 %
β -n : 2.70 %;
t1/2: 0.51s ;

Lanthanum radioactive isotope number 44: 151La
Neutrons: 94;
Jn: Unknown;
Decay: β -
β -n;
t1/2: 3E-07s ≈ 0.30 µs;

Lanthanum radioactive isotope number 45: 152La
Neutrons: 95;
Jn: Unknown;
Decay: β - ?;
t1/2: 1.5E-07s ≈ 0.15 µs;

Lanthanum radioactive isotope number 46: 153La
Neutrons: 96;
Jn: Unknown;
Decay: β - ?;
t1/2: 1E-07s ≈ 0.10 µs;

Lanthanum radioactive isotope number 47: 154La
Neutrons: 97;
Jn: Unknown;
Decay: β - ?;
t1/2: 0.1s ;

Lanthanum radioactive isotope number 48: 155La
Neutrons: 98;
Jn: Unknown;
Decay: β - ?;
t1/2: 0.06s ≈ 60.00 ms;
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