Helium Isotopes
Proton number: 2
Helium 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+; |
Helium Natural Radioactive isotopes
Helium 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; |