Periodic Table/Aluminum/³¹Al

← 30Al32Al →

³¹Al

Aluminum-31

Radioactive· Half-life: 644 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

13

Neutrons (N)

18

Mass Number (A)

31

Atomic Mass

30.983950AMU

Spin / Parity

5/2+

Binding E/A

8.011keV

Natural Abundance

Trace / None

Half-life

644 ms

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

β⁻

100.0%

β⁻n

1.6%

Decay Chain

³¹AlAluminum644 ms

β⁻100.0%

β⁻n³⁰Si1.60%

³¹SiSilicon2.62 h

β⁻100.0%

³¹PPhosphorusSTABLE

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

Other Isotopes of Aluminum

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

← Back to AluminumData: IAEA NDS · ENSDF