Isotopes of neon
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Neon (10Ne) naturally occurs as three stable isotopes: 20Ne, 21Ne, and 22Ne. Their stated natural abundances are those measured in air.
In addition, 17 artificial radioisotopes have been discovered, ranging from 15Ne to 34Ne, all short-lived: the most stable is 24Ne with a half-life of 3.38 minutes. All others are under a minute, and most under a second. The isotopes lighter than the stable ones usually decay to fluorine or oxygen, while heavier ones decay to sodium.
List of isotopes
| Nuclide | Z | N | Isotopic mass (Da) | Discovery year | Half-life [resonance width] | Decay mode | Daughter isotope | Spin and parity | Natural abundance (mole fraction) | |
|---|---|---|---|---|---|---|---|---|---|---|
| Normal proportion | Range of variation | |||||||||
| 15Ne | 10 | 5 | 15.043170(70) | 770(300) ys [590(230) keV] | 2p | 13O | (3/2−) | |||
| 16Ne | 10 | 6 | 16.025751(22) | > 5.7 zs [< 80 keV] | 2p | 14O | 0+ | |||
| 17Ne | 10 | 7 | 17.0177140(4) | 109.2(6) ms | β+p (94.4(2.9)%) | 16O | 1/2− | |||
| β+α (3.51(1)%) | 13N | |||||||||
| β+ (2.1(2.9)%) | 17F | |||||||||
| β+pα (0.014(4)%) | 12C | |||||||||
| 18Ne | 10 | 8 | 18.0057087(4) | 1.66420(47) s | β+ | 18F | 0+ | |||
| 19Ne | 10 | 9 | 19.00188091(17) | 17.2569(19) s | β+ | 19F | 1/2+ | |||
| 20Ne | 10 | 10 | 19.9924401753(16) | Stable | 0+ | 0.9048(3) | [0.8847, 0.9051] | |||
| 21Ne | 10 | 11 | 20.99384669(4) | Stable | 3/2+ | 0.0027(1) | [0.0027, 0.0171] | |||
| 22Ne | 10 | 12 | 21.991385114(19) | Stable | 0+ | 0.0925(3) | [0.0920, 0.0996] | |||
| 23Ne | 10 | 13 | 22.99446691(11) | 37.15(3) s | β− | 23Na | 5/2+ | |||
| 24Ne | 10 | 14 | 23.9936106(6) | 3.38(2) min | β− | 24Na | 0+ | |||
| 25Ne | 10 | 15 | 24.997810(30) | 602(8) ms | β− | 25Na | 1/2+ | |||
| 26Ne | 10 | 16 | 26.000516(20) | 197(2) ms | β− (99.87(3)%) | 26Na | 0+ | |||
| β−n (0.13(3)%) | 25Na | |||||||||
| 27Ne | 10 | 17 | 27.007570(100) | 30.9(1.1) ms | β− (98.0(5)%) | 27Na | (3/2+) | |||
| β−n (2.0(5)%) | 26Na | |||||||||
| β−2n ? | 25Na ? | |||||||||
| 28Ne | 10 | 18 | 28.012130(140) | 18.8(2) ms | β− (84.3(1.1)%) | 28Na | 0+ | |||
| β−n (12(1)%) | 27Na | |||||||||
| β−2n (3.7(5)%) | 26Na | |||||||||
| 29Ne | 10 | 19 | 29.019750(160) | 14.7(4) ms | β− (68.0(5.1)%) | 29Na | (3/2−) | |||
| β−n (28(5)%) | 28Na | |||||||||
| β−2n (4(1)%) | 27Na | |||||||||
| 30Ne | 10 | 20 | 30.024990(270) | 7.22(18) ms | β− (78.1(4.6)%) | 30Na | 0+ | |||
| β−n (13(4)%) | 29Na | |||||||||
| β−2n (8.9(2.3)%) | 28Na | |||||||||
| 31Ne | 10 | 21 | 31.033470(290) | 3.4(8) ms | β− | 31Na | (3/2−) | |||
| β−n ? | 30Na ? | |||||||||
| β−2n ? | 29Na ? | |||||||||
| 32Ne | 10 | 22 | 32.039720(540)# | 3.5(9) ms | β− | 32Na | 0+ | |||
| β−n ? | 31Na ? | |||||||||
| β−2n ? | 30Na ? | |||||||||
| 34Ne | 10 | 24 | 34.056730(550)# | 2 ms# [> 1.5 μs] | β− ? | 34Na | 0+ | |||
| β−2n ? | 32Na ? | |||||||||
| β−n ? | 33Na ? | |||||||||
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See also
Daughter products other than neon