Periodic Table/Argon/³¹Ar

← 30Ar32Ar →

³¹Ar

Argon-31

Radioactive· Half-life: 15.0 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

18

Neutrons (N)

13

Mass Number (A)

31

Atomic Mass

31.012158AMU

Spin / Parity

5/2+

Binding E/A

6.955keV

Natural Abundance

Trace / None

Half-life

15.0 ms

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

β⁺

100.0%

β⁺p

68.3%

2p

9.0%

B+pA

0.4%

3p

0.1%

β⁺α

0.0%

2p

0.0%

Decay Chain

³¹ArArgon15.0 ms

β⁺100.0%

β⁺p³⁰S68.3%

2p²⁹S9.00%

B+pA²⁶Si0.38%

3p²⁸P0.07%

β⁺α²⁷P0.03%

2p²⁹S0.00%

³¹ClChlorine190 ms

β⁺100.0%

β⁺p³⁰P2.40%

³¹SSulfur2.55 s

β⁺100.0%

³¹PPhosphorusSTABLE

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

Other Isotopes of Argon

29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

← Back to ArgonData: IAEA NDS · ENSDF