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Radium Isotopes






Proton number: 88


Stable Isotopes

There is no Radium Stable isotopes known

Natural Radioactive isotopes

There is no Radium Natural Radioactive isotopes known

Artificial Radioactive isotopes


Radium radioactive isotope number 1: 202Ra
Neutrons: 114;
Jn: 0+;
Decay: α;
t1/2: 0.0007s ≈ 0.70 ms;

Radium radioactive isotope number 2: 203Ra
Neutrons: 115;
Jn: 3/2-;
Decay: α ~ 100.00 %;
t1/2: 0.031s ≈ 31.00 ms;

Radium radioactive isotope number 3: 203Ra
Neutrons: 115;
Jn: 13/2+;
Decay: α ~ 100.00 %;
t1/2: 0.024s ≈ 24.00 ms;

Radium radioactive isotope number 4: 204Ra
Neutrons: 116;
Jn: 0+;
Decay: α;
t1/2: 0.059s ≈ 59.00 ms;

Radium radioactive isotope number 5: 205Ra
Neutrons: 117;
Jn: 3/2-;
Decay: α ≤ 100.00 %
ε;
t1/2: 0.21s ;

Radium radioactive isotope number 6: 205Ra
Neutrons: 117;
Jn: 13/2+;
Decay: α ≤ 100.00 %
ε;
t1/2: 0.17s ;

Radium radioactive isotope number 7: 206Ra
Neutrons: 118;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 0.24s ;

Radium radioactive isotope number 8: 207Ra
Neutrons: 119;
Jn: 5/2-,3/2-;
Decay: α ~ 90.00 %
ε ~ 10.00 %;
t1/2: 1.3s ;

Radium radioactive isotope number 9: 207Ra
Neutrons: 119;
Jn: 13/2+;
Decay: IT : 85.00 %
α : 15.00 %
ε ~ 0.35 %;
t1/2: 0.055s ≈ 55.00 ms;

Radium radioactive isotope number 10: 208Ra
Neutrons: 120;
Jn: 0+;
Decay: α : 95.00 %
ε : 5.00 %;
t1/2: 1.3s ;

Radium radioactive isotope number 11: 209Ra
Neutrons: 121;
Jn: 5/2-;
Decay: α ~ 90.00 %
ε ~ 10.00 %;
t1/2: 4.6s ;

Radium radioactive isotope number 12: 210Ra
Neutrons: 122;
Jn: 0+;
Decay: α ~ 96.00 %
ε ~ 4.00 %;
t1/2: 3.7s ;

Radium radioactive isotope number 13: 211Ra
Neutrons: 123;
Jn: 5/2-;
Decay: α > 93.00 %
ε < 7.00 %;
t1/2: 13s ;

Radium radioactive isotope number 14: 212Ra
Neutrons: 124;
Jn: 0+;
Decay: α ~ 85.00 %
ε ~ 15.00 %;
t1/2: 13s ;

Radium radioactive isotope number 15: 213Ra
Neutrons: 125;
Jn: 1/2-;
Decay: α : 80.00 %
ε : 20.00 %;
t1/2: 164.4s ≈ 2.74 m;

Radium radioactive isotope number 16: 213Ra
Neutrons: 125;
Jn: Unknown;
Decay: IT ~ 99.00 %
α ~ 1.00 %;
t1/2: 0.0021s ≈ 2.10 ms;

Radium radioactive isotope number 17: 214Ra
Neutrons: 126;
Jn: 0+;
Decay: α : 99.94 %
ε : 0.06 %;
t1/2: 2.46s ;

Radium radioactive isotope number 18: 215Ra
Neutrons: 127;
Jn: 9/2+;
Decay: α : 100.00 %;
t1/2: 0.00155s ≈ 1.55 ms;

Radium radioactive isotope number 19: 216Ra
Neutrons: 128;
Jn: 0+;
Decay: α : 100.00 %
ε < 1.0E-8 %;
t1/2: 1.82E-07s ≈ 0.18 µs;

Radium radioactive isotope number 20: 217Ra
Neutrons: 129;
Jn: 9/2+;
Decay: α ~ 100.00 %;
t1/2: 1.6E-06s ≈ 1.60 µs;

Radium radioactive isotope number 21: 218Ra
Neutrons: 130;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 2.52E-05s ≈ 25.20 µs;

Radium radioactive isotope number 22: 219Ra
Neutrons: 131;
Jn: 7/2+;
Decay: α : 100.00 %;
t1/2: 0.01s ≈ 10.00 ms;

Radium radioactive isotope number 23: 220Ra
Neutrons: 132;
Jn: 0+;
Decay: α : 100.00 %;
t1/2: 0.018s ≈ 18.00 ms;

Radium radioactive isotope number 24: 221Ra
Neutrons: 133;
Jn: 5/2+;
Decay: α : 100.00 %
14C : 1E-12 %;
t1/2: 28s ;

Radium radioactive isotope number 25: 222Ra
Neutrons: 134;
Jn: 0+;
Decay: α : 100.00 %
14C : 3.0E-8 %;
t1/2: 38s ;

Radium radioactive isotope number 26: 223Ra
Neutrons: 135;
Jn: 3/2+;
Decay: α : 100.00 %
14C : 8.9E-8 %;
t1/2: 987552s ≈ 11.43 d;

Radium radioactive isotope number 27: 224Ra
Neutrons: 136;
Jn: 0+;
Decay: α : 100.00 %
14C : 4.0E-9 %;
t1/2: 313796.2s ≈ 3.63 d;

Radium radioactive isotope number 28: 225Ra
Neutrons: 137;
Jn: 1/2+;
Decay: β - : 100.00 %;
t1/2: 1287360s ≈ 14.90 d;

Radium radioactive isotope number 29: 226Ra
Neutrons: 138;
Jn: 0+;
Decay: α : 100.00 %
14C : 3.2E-9 %;
t1/2: 50457600000s ≈ 1.600000e+3 y;

Radium radioactive isotope number 30: 227Ra
Neutrons: 139;
Jn: 3/2+;
Decay: β - : 100.00 %;
t1/2: 2532s ≈ 42.20 m;

Radium radioactive isotope number 31: 228Ra
Neutrons: 140;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 181332000s ≈ 5.75 y;

Radium radioactive isotope number 32: 229Ra
Neutrons: 141;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 240s ≈ 4.00 m;

Radium radioactive isotope number 33: 230Ra
Neutrons: 142;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 5580s ≈ 1.55 h;

Radium radioactive isotope number 34: 231Ra
Neutrons: 143;
Jn: 5/2+;
Decay: β - : 100.00 %;
t1/2: 103s ;

Radium radioactive isotope number 35: 232Ra
Neutrons: 144;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 252s ≈ 4.20 m;

Radium radioactive isotope number 36: 233Ra
Neutrons: 145;
Jn: Unknown;
Decay: β - : 100.00 %;
t1/2: 30s ;

Radium radioactive isotope number 37: 234Ra
Neutrons: 146;
Jn: 0+;
Decay: β - : 100.00 %;
t1/2: 30s ;
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