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Protactinium Isotopes






Proton number: 91


Stable Isotopes

There is no Protactinium Stable isotopes known

Natural Radioactive isotopes

There is no Protactinium Natural Radioactive isotopes known

Artificial Radioactive isotopes


Protactinium radioactive isotope number 1: 212Pa
Neutrons: 121;
Jn: Unknown;
Decay: α ~ 100.00 %;
t1/2: 0.0051s ≈ 5.10 ms;

Protactinium radioactive isotope number 2: 213Pa
Neutrons: 122;
Jn: 9/2-;
Decay: α : 100.00 %;
t1/2: 0.0053s ≈ 5.30 ms;

Protactinium radioactive isotope number 3: 214Pa
Neutrons: 123;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.017s ≈ 17.00 ms;

Protactinium radioactive isotope number 4: 215Pa
Neutrons: 124;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.014s ≈ 14.00 ms;

Protactinium radioactive isotope number 5: 216Pa
Neutrons: 125;
Jn: Unknown;
Decay: α ~ 98.00 %
ε ~ 2.00 %;
t1/2: 0.105s ;

Protactinium radioactive isotope number 6: 217Pa
Neutrons: 126;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.0036s ≈ 3.60 ms;

Protactinium radioactive isotope number 7: 217Pa
Neutrons: 126;
Jn: Unknown;
Decay: α : 73.00 %
IT : 27.00 %;
t1/2: 0.0012s ≈ 1.20 ms;

Protactinium radioactive isotope number 8: 218Pa
Neutrons: 127;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.000113s ≈ 0.11 ms;

Protactinium radioactive isotope number 9: 219Pa
Neutrons: 128;
Jn: 9/2-;
Decay: α : 100.00 %;
t1/2: 5.3E-08s ≈ 53.00 ns;

Protactinium radioactive isotope number 10: 220Pa
Neutrons: 129;
Jn: Unknown;
Decay: α : 100.00 %
ε : 3.0E-7 %;
t1/2: 7.8E-07s ≈ 0.78 µs;

Protactinium radioactive isotope number 11: 221Pa
Neutrons: 130;
Jn: 9/2-;
Decay: α : 100.00 %;
t1/2: 4.9E-06s ≈ 4.90 µs;

Protactinium radioactive isotope number 12: 222Pa
Neutrons: 131;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.0033s ≈ 3.30 ms;

Protactinium radioactive isotope number 13: 223Pa
Neutrons: 132;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.0051s ≈ 5.10 ms;

Protactinium radioactive isotope number 14: 224Pa
Neutrons: 133;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 0.85s ;

Protactinium radioactive isotope number 15: 225Pa
Neutrons: 134;
Jn: Unknown;
Decay: α : 100.00 %;
t1/2: 1.7s ;

Protactinium radioactive isotope number 16: 226Pa
Neutrons: 135;
Jn: Unknown;
Decay: α : 74.00 %
ε : 26.00 %;
t1/2: 108s ;

Protactinium radioactive isotope number 17: 227Pa
Neutrons: 136;
Jn: 5/2-;
Decay: α : 85.00 %
ε : 15.00 %;
t1/2: 2298s ≈ 38.30 m;

Protactinium radioactive isotope number 18: 228Pa
Neutrons: 137;
Jn: 3+;
Decay: ε : 98.00 %
α : 2.00 %;
t1/2: 79200s ≈ 22.00 h;

Protactinium radioactive isotope number 19: 229Pa
Neutrons: 138;
Jn: 5/2+;
Decay: ε : 99.52 %
α : 0.48 %;
t1/2: 129600s ≈ 36.00 h;

Protactinium radioactive isotope number 20: 230Pa
Neutrons: 139;
Jn: 2-;
Decay: ε : 91.60 %
β - : 8.40 %
α : 3.2E-3 %;
t1/2: 1503360s ≈ 17.40 d;

Protactinium radioactive isotope number 21: 231Pa
Neutrons: 140;
Jn: 3/2-;
Decay: α : 100.00 %
SF ≤ 3E-10 %;
t1/2: 1.033119E+12s ≈ 3.275999e+4 y;

Protactinium radioactive isotope number 22: 232Pa
Neutrons: 141;
Jn: 2-;
Decay: β - : 100.00 %
ε : 3.0E-3 %;
t1/2: 114048s ≈ 31.68 h;

Protactinium radioactive isotope number 23: 233Pa
Neutrons: 142;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 2330640s ≈ 26.98 d;

Protactinium radioactive isotope number 24: 234Pa
Neutrons: 143;
Jn: 4+;
Decay: β - : 100.00 %;
t1/2: 24120s ≈ 6.70 h;

Protactinium radioactive isotope number 25: 234Pa
Neutrons: 143;
Jn: 0-;
Decay: β - : 99.84 %
IT : 0.16 %;
t1/2: 70.2s ;

Protactinium radioactive isotope number 26: 235Pa
Neutrons: 144;
Jn: 3/2-;
Decay: β - : 100.00 %;
t1/2: 1466.4s ≈ 24.44 m;

Protactinium radioactive isotope number 27: 236Pa
Neutrons: 145;
Jn: 1-;
Decay: β - : 100.00 %;
t1/2: 546s ≈ 9.10 m;

Protactinium radioactive isotope number 28: 237Pa
Neutrons: 146;
Jn: 1/2+;
Decay: β - : 100.00 %;
t1/2: 522s ≈ 8.70 m;

Protactinium radioactive isotope number 29: 238Pa
Neutrons: 147;
Jn: 3-;
Decay: β - : 100.00 %
SF < 2.6E-6 %;
t1/2: 136.2s ≈ 2.27 m;

Protactinium radioactive isotope number 30: 239Pa
Neutrons: 148;
Jn: 3/2;
Decay: β - : 100.00 %;
t1/2: 6480s ≈ 1.80 h;

Protactinium radioactive isotope number 31: 240Pa
Neutrons: 149;
Jn: Unknown;
Decay: β - ?;
t1/2: 120s ≈ 2.00 m;
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