Periodic Table/Helium/⁸He

← 7He9He →

⁸He

Helium-8

Radioactive· Half-life: 120 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

2

Neutrons (N)

6

Mass Number (A)

8

Atomic Mass

8.033934AMU

Spin / Parity

0+

Binding E/A

3.797keV

Natural Abundance

Trace / None

Half-life

120 ms

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁻

100.0%

β⁻n

16.0%

B-t

0.9%

Decay Chain

⁸HeHelium120 ms

β⁻100.0%

β⁻n⁷Li16.0%

B-t⁵He0.90%

⁸LiLithium839 ms

β⁻100.0%

β⁻α⁴He100.0%

⁸BeBeryllium81.9 as

α100.0%

⁴HeHeliumSTABLE

4-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Helium

3 4 5 6 7 8 9 10

← Back to HeliumData: IAEA NDS · ENSDF