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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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