Helium Isotopes
Proton number: 2
Stable Isotopes
Helium stable isotope number 1: 3He | | Neutrons: | 1; | | Abundance: | 0.000137%; | | Jn: | 1/2+; |
Helium stable isotope number 2: 4He | | Neutrons: | 2; | | Abundance: | 99.9999%; | | Jn: | 0+; |
Natural Radioactive isotopes
There is no Helium Natural Radioactive isotopes known
Artificial Radioactive isotopes
Helium radioactive isotope number 1: 5He | | Neutrons: | 3; | | Jn: | 3/2-; | | Decay: | n : 100.00 %
α : 100.00 %; | | t1/2: | 2.73594E-22s ≈ 0.00 fs; |
Helium radioactive isotope number 2: 6He | | Neutrons: | 4; | | Jn: | 0+; | | Decay: | β - : 100.00 %; | | t1/2: | 0.8067s ; |
Helium radioactive isotope number 3: 7He | | Neutrons: | 5; | | Jn: | 3/2-; | | Decay: | n; | | t1/2: | 6.83985E-17s ≈ 0.07 fs; |
Helium radioactive isotope number 4: 8He | | Neutrons: | 6; | | Jn: | 0+; | | Decay: | β - : 100.00 %
β -n : 16.00 %; | | t1/2: | 0.1191s ; |
Helium radioactive isotope number 5: 9He | | Neutrons: | 7; | | Jn: | 1/2+; | | Decay: | n : 100.00 %; | | t1/2: | unknowns ; |
Helium radioactive isotope number 6: 10He | | Neutrons: | 8; | | Jn: | 0+; | | Decay: | 2n ?; | | t1/2: | 7.75183E-23s ≈ 0.00 fs; |
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