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Astatine Isotopes






Proton number: 85


Stable Isotopes

There is no Astatine Stable isotopes known

Natural Radioactive isotopes

There is no Astatine Natural Radioactive isotopes known

Artificial Radioactive isotopes


Astatine radioactive isotope number 1: 191At
Neutrons: 106;
Jn: 1/2+;
Decay: α : 100.00 %;
t1/2: 0.0017s ≈ 1.70 ms;

Astatine radioactive isotope number 2: 191At
Neutrons: 106;
Jn: 7/2-;
Decay: α : 100.00 %;
t1/2: 0.0021s ≈ 2.10 ms;

Astatine radioactive isotope number 3: 193At
Neutrons: 108;
Jn: 1/2+;
Decay: α ~ 100.00 %;
t1/2: 0.028s ≈ 28.00 ms;

Astatine radioactive isotope number 4: 193At
Neutrons: 108;
Jn: 7/2-;
Decay: α ~ 100.00 %;
t1/2: 0.021s ≈ 21.00 ms;

Astatine radioactive isotope number 5: 193At
Neutrons: 108;
Jn: 13/2+;
Decay: IT : 76.00 % α : 24.00 %;
t1/2: 0.027s ≈ 27.00 ms;

Astatine radioactive isotope number 6: 194At
Neutrons: 109;
Jn: Unknown;
Decay: α
ε;
t1/2: 0.04s ≈ 40.00 ms;

Astatine radioactive isotope number 7: 194At
Neutrons: 109;
Jn: Unknown;
Decay: IT
α
ε;
t1/2: 0.25s ;

Astatine radioactive isotope number 8: 195At
Neutrons: 110;
Jn: 1/2+;
Decay: α : 100.00 %;
t1/2: 0.328s ;

Astatine radioactive isotope number 9: 195At
Neutrons: 110;
Jn: 7/2-;
Decay: α : 100.00 %;
t1/2: 0.147s ;

Astatine radioactive isotope number 10: 196At
Neutrons: 111;
Jn: Unknown;
Decay: α : 94.00 %
ε;
t1/2: 0.39s ;

Astatine radioactive isotope number 11: 197At
Neutrons: 112;
Jn: 9/2-;
Decay: α : 96.10 %
ε : 3.90 %;
t1/2: 0.388s ;

Astatine radioactive isotope number 12: 197At
Neutrons: 112;
Jn: 1/2+;
Decay: α ≤ 100.00 %
IT ≤ 4.0E-3 %
ε;
t1/2: 2s ;

Astatine radioactive isotope number 13: 198At
Neutrons: 113;
Jn: 3+;
Decay: α : 90.00 %
ε : 10.00 %;
t1/2: 4.2s ;

Astatine radioactive isotope number 14: 198At
Neutrons: 113;
Jn: 10-;
Decay: α : 84.00 %
ε : 16.00 %;
t1/2: 1s ;

Astatine radioactive isotope number 15: 199At
Neutrons: 114;
Jn: 9/2-;
Decay: α : 90.00 %
ε : 10.00 %;
t1/2: 7.03s ;

Astatine radioactive isotope number 16: 200At
Neutrons: 115;
Jn: 3+;
Decay: α : 57.00 %
ε : 43.00 %;
t1/2: 43s ;

Astatine radioactive isotope number 17: 200At
Neutrons: 115;
Jn: 7+;
Decay: ε ≤ 57.00 %
α : 43.00 %;
t1/2: 47s ;

Astatine radioactive isotope number 18: 200At
Neutrons: 115;
Jn: 10-;
Decay: IT ~ 84.00 %
α ~ 10.50 %
ε ~ 4.50 %;
t1/2: 3.5s ;

Astatine radioactive isotope number 19: 201At
Neutrons: 116;
Jn: 9/2-;
Decay: α : 71.00 %
ε : 29.00 %;
t1/2: 85.2s ;

Astatine radioactive isotope number 20: 202At
Neutrons: 117;
Jn: 2,3+;
Decay: ε : 82.00 %
α : 18.00 %;
t1/2: 184s ≈ 3.07 m;

Astatine radioactive isotope number 21: 202At
Neutrons: 117;
Jn: 7+;
Decay: ε : 91.30 %
α : 8.70 %;
t1/2: 182s ≈ 3.03 m;

Astatine radioactive isotope number 22: 202At
Neutrons: 117;
Jn: 10-;
Decay: IT : 99.70 %
ε : 0.25 %
α : 0.10 %;
t1/2: 0.46s ;

Astatine radioactive isotope number 23: 203At
Neutrons: 118;
Jn: 9/2-;
Decay: ε : 69.00 %
α : 31.00 %;
t1/2: 444s ≈ 7.40 m;

Astatine radioactive isotope number 24: 204At
Neutrons: 119;
Jn: 7+;
Decay: ε : 96.20 %
α : 3.80 %;
t1/2: 552s ≈ 9.20 m;

Astatine radioactive isotope number 25: 204At
Neutrons: 119;
Jn: 10-;
Decay: IT : 100.00 %;
t1/2: 0.108s ;

Astatine radioactive isotope number 26: 205At
Neutrons: 120;
Jn: 9/2-;
Decay: ε : 90.00 %
α : 10.00 %;
t1/2: 1614s ≈ 26.90 m;

Astatine radioactive isotope number 27: 206At
Neutrons: 121;
Jn: 5+;
Decay: ε : 99.11 %
α : 0.89 %;
t1/2: 1836s ≈ 30.60 m;

Astatine radioactive isotope number 28: 207At
Neutrons: 122;
Jn: 9/2-;
Decay: ε : 91.40 %
α : 8.60 %;
t1/2: 6480s ≈ 1.80 h;

Astatine radioactive isotope number 29: 208At
Neutrons: 123;
Jn: 6+;
Decay: ε : 99.45 %
α : 0.55 %;
t1/2: 5868s ≈ 1.63 h;

Astatine radioactive isotope number 30: 209At
Neutrons: 124;
Jn: 9/2-;
Decay: ε : 95.90 %
α : 4.10 %;
t1/2: 19476s ≈ 5.41 h;

Astatine radioactive isotope number 31: 210At
Neutrons: 125;
Jn: 5+;
Decay: ε : 99.82 %
α : 0.18 %;
t1/2: 29160s ≈ 8.10 h;

Astatine radioactive isotope number 32: 211At
Neutrons: 126;
Jn: 9/2-;
Decay: ε : 58.20 %
α : 41.80 %;
t1/2: 25970.4s ≈ 7.21 h;

Astatine radioactive isotope number 33: 212At
Neutrons: 127;
Jn: 1-;
Decay: α : 100.00 %
ε < 0.03 %
β - < 2.0E-6 %;
t1/2: 0.314s ;

Astatine radioactive isotope number 34: 212At
Neutrons: 127;
Jn: 9-;
Decay: α > 99.00 %
IT < 1.00 %;
t1/2: 0.119s ;

Astatine radioactive isotope number 35: 213At
Neutrons: 128;
Jn: 9/2-;
Decay: α : 100.00 %;
t1/2: 1.25E-07s ≈ 0.12 µs;

Astatine radioactive isotope number 36: 214At
Neutrons: 129;
Jn: 1-;
Decay: α : 100.00 %;
t1/2: 5.58E-07s ≈ 0.56 µs;

Astatine radioactive isotope number 37: 215At
Neutrons: 130;
Jn: 9/2-;
Decay: α : 100.00 %;
t1/2: 0.0001s ≈ 0.10 ms;

Astatine radioactive isotope number 38: 216At
Neutrons: 131;
Jn: 1-;
Decay: α : 100.00 %
β - < 6.0E-3 %
ε < 3.0E-7 %;
t1/2: 0.0003s ≈ 0.30 ms;

Astatine radioactive isotope number 39: 216At
Neutrons: 131;
Jn: 9-;
Decay: α : 100.00 %;
t1/2: 0.0001s ≈ 0.10 ms;

Astatine radioactive isotope number 40: 217At
Neutrons: 132;
Jn: 9/2-;
Decay: α : 99.99 %
β - : 7.0E-3 %;
t1/2: 0.0323s ≈ 32.30 ms;

Astatine radioactive isotope number 41: 218At
Neutrons: 133;
Jn: Unknown;
Decay: α : 99.90 %
β - : 0.10 %;
t1/2: 1.5s ;

Astatine radioactive isotope number 42: 219At
Neutrons: 134;
Jn: Unknown;
Decay: α ~ 97.00 %
β - ~ 3.00 %;
t1/2: 56s ;

Astatine radioactive isotope number 43: 220At
Neutrons: 135;
Jn: 3;
Decay: β - : 92.00 %
α : 8.00 %;
t1/2: 222.6s ≈ 3.71 m;

Astatine radioactive isotope number 44: 221At
Neutrons: 136;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 138s ≈ 2.30 m;

Astatine radioactive isotope number 45: 222At
Neutrons: 137;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 54s ;

Astatine radioactive isotope number 46: 223At
Neutrons: 138;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 50s ;
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