Of the 19 known isotopes of neon, 3 occur as stable nuclei in nature: 20neon, 21neon and 22neon. All other isotopes of neon are unstable radionuclides, of which 24neon is the most long-lived with a half-life of almost 3.5 minutes.
| Atomic Mass ma | Quantity | Half-life | Spin | |
| Neon Isotopic mixture | 20,1797 u | 100 % | ||
| Isotope 20Ne | 19,99244018(2) u | 90,48(3) % | stable | 0+ |
| Isotope 21Ne | 20,9938467(3) u | 0,27(1) % | stable | 3/2+ |
| Isotope 22Ne | 21,9913851(2) u | 9,25(3) % | stable | 0+ |
As with all chemical elements whose natural composition consists of several isotopes, the proportions of the individual isotopes to one another (isotope ratio) can vary to a greater or lesser extent.
| Isotope Nuclide | E | N | Atomic Mass [Nuclear Mass] {Mass Excess} | Spin I (h/2π) | Parent |
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
| Neon-15 | 1510Ne | 5 | 15.04317(7) u [15.0376842 u] {40.2126 MeV} | (3/2-) | |
| Neon-16 | 1610Ne | 6 | 16.025751(22) u [16.0202652 u] {23.9869 MeV} | 0+ | |
| Neon-17 | 1710Ne | 7 | 17.0177140(4) u [17.0122282 u] {16.50048 MeV} | 1/2- | 19Mg |
| Neon-18 | 1810Ne | 8 | 18.0057087(4) u [18.0002229 u] {5.31762 MeV} | 0+ | |
| Neon-19 | 1910Ne | 9 | 19.00188090(17) u [18.9963951 u] {1.75205 MeV} | 1/2+ | |
| Neon-20 | 2010Ne | 10 | 19.99244018(2) u [19.9869544 u] {-7.04193 MeV} | 0+ | 20F 20Na |
| Neon-21 | 2110Ne | 11 | 20.9938467(3) u [20.9883609 u] {-5.73176 MeV} | 3/2+ | 21F 21Na |
| Neon-22 | 2210Ne | 12 | 21.9913851(2) u [21.9858993 u] {-8.02473 MeV} | 0+ | 22F 22Na |
| Neon-23 | 2310Ne | 13 | 22.99446690(11) u [22.9889811 u] {-5.15405 MeV} | 5/2+ | 23F |
| Neon-24 | 2410Ne | 14 | 23.9936106(5) u [23.9881248 u] {-5.95169 MeV} | 0+ | 24F 25F |
| Neon-25 | 2510Ne | 15 | 24.99781(3) u [24.9923242 u] {-2.03997 MeV} | 1/2+ | 25F |
| Neon-26 | 2610Ne | 16 | 26.000516(20) u [25.9950302 u] {0.48065 MeV} | 0+ | 26F 30Na |
| Neon-27 | 2710Ne | 17 | 27.00757(10) u [27.0020842 u] {7.05141 MeV} | (3/2+) | |
| Neon-28 | 2810Ne | 18 | 28.01213(14) u [28.0066442 u] {11.29902 MeV} | 0+ | |
| Neon-29 | 2910Ne | 19 | 29.01975(16) u [29.0142642 u] {18.39701 MeV} | (3/2+) | |
| Neon-30 | 3010Ne | 20 | 30.02499(27) u [30.0195042 u] {23.27804 MeV} | 0+ | |
| Neon-31 | 3110Ne | 21 | 31.03347(29) u [31.0279842 u] {31.1771 MeV} | (3/2-) | |
| Neon-32 | 3210Ne | 22 | 32.03972(54) u [32.0342342 u] {36.99894 MeV} | 0+ | |
| Neon-33 | 3310Ne | 23 | 33.04938(64) u [33.0438942 u] {45.99717 MeV} | ||
| Neon-34 | 3410Ne | 24 | 34.05673(55) u [34.0512442 u] {52.84365 MeV} | 0+ |
| Isotope | Radioactive Decay | Extern | |||
|---|---|---|---|---|---|
| Half-life | Decay Mode | Probability | Energy | ||
| 7 | 8 | 9 | 10 | 11 | 12 |
| Ne-15 | 7.7(3) × 10-22 s | 2p 13O | 100 % | ||
| Ne-16 | 3.74 × 10-20 s | p → 14O | 100 % | 1.411 MeV | AL |
| Ne-17 | 109.2(6) ms | EC/β+ → 17F ε, p → 16O ε, α → 13C | 1.3 % 96.0 % 2.7 % | 14.5487(4) MeV 13.909 MeV 8.691 MeV | AL |
| Ne-18 | 1.672(8) s | β+ → 18F | 100 % | 4.4445(6) MeV | AL |
| Ne-19 | 17.22(2) s | β+ → 19F | 100 % | 3.23949(16) MeV | AL |
| Ne-20 | stable | AL | |||
| Ne-21 | stable | AL | |||
| Ne-22 | stable | AL | |||
| Ne-23 | 37.24(12) s | β- → 23Na | 100 % | 4.3758(1) MeV | AL |
| Ne-24 | 3.38(2) min | β- → 24Na | 100 % | 2.4663(5) MeV | AL |
| Ne-25 | 602(8) ms | β- → 25Na | 100 % | 7.322(29) MeV | AL |
| Ne-26 | 197(2) ms | β- → 26Na β-, n → 25Na | 99.87 % 0.13(3) % | 7.342(19) MeV 1.768(18) MeV | AL |
| Ne-27 | 31.5(13) ms | β- → 27Na β-, n → 26Na | 98 % 2.0(5) % | 12.553 MeV 5.8253 MeV | AL |
| Ne-28 | 20(1) ms | β- → 28Na β-, n → 27Na β-, 2n → 26Na | 84.3 % 12.0 % 3.7 % | 12.29(13) MeV 8.75(13) MeV | AL |
| Ne-29 | 15(3) ms | β- → 29Na β-, n → 28Na β-, 2n → 27Na | 68 % 28(5) % 4(1) % | 15.72(15) MeV 11.32(15) MeV | AL |
| Ne-30 | 7.3(3) ms | β- → 30Na β-, n → 29Na β-, 2n → 28Na | 78.1 % 13(4) % 8.9(23) % | 14.81(25) MeV 12.53(25) MeV | AL |
| Ne-31 | 3.4(8) ms | β- → 31Na β-, n → 30Na β-, 2n → 29Na | 100 % ? ? | 18.94(27) MeV 14.64(27) MeV | AL |
| Ne-32 | 3.5(9) ms | β- → 32Na β-, n → 31Na | 100 % ? | 18.36(50) MeV 16.68(50) MeV | AL |
| Ne-33 | 180 ns | n ? | AL | ||
| Ne-34 | 60 ns | β- → 34Na β-, n ? 33Na β-, 2n ? 32Na | ? ? ? | AL | |
Notes (related to the columns):
1 - name of the nuclide, isotope.
2 - E: isotope symbol with mass number (superscript; number of nucleons) and Atomic number (subscript; number of protons).
3 - N: number of neutrons.
4 - relative atomic mass of the Neon isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
5 - nuclear spin I, unit: h/2π.
6 - source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
7 - isotope notation in short form.
8 - decay: half-live of the Neon isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
9 - decay mode: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
10 - decay probability in percent (%).
11 - decay energy; Particle energy related to decay type.
12 - other information and notes: AL = Adopted Levels (link to external data [1]).
Miscellaneous:
()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
- unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.
| Nuclide quantity 1) spin | Nuclear magnetic moment μ/μN | Gyromagnetic ratio {Quadrupole moment} | Resonant frequency v0 bei 1 T | Relative sensitivity H0 = const. v0 = const. 3) |
|---|---|---|---|---|
| 21Ne 0,27(1) % 3/2+ | -0,66170(3) | - 2,113 {+ 0,10155(75)} | 3,3631 | 0,00246 0,3949 |
1) Quantity Percentage of natural occurrence.
2) Gyromagnetic ratio: 107 rad T-1 s-1
Quadrupole moment: Q [barn] = [100 fm2]
3) Related to 1H = 1,000.
According to the Radiation Protection Ordinance (StrlSchV 2018, Germany), the following values (columns 1 to 7) apply to the handling of Neon radionuclides:
| Nuclide | Limit Value | HASS limit | SC | Daughter Nuclides | Half-life | |
|---|---|---|---|---|---|---|
| Ne-19 | 109 Bq | 100 Bq/g | < 10 min | |||
(HASS = High-Activity Sealed Radioactive Sources; SC = surface contamination)
Properties of the Neon nucleides
[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.
[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.
[3] - Live Chart of Nuclides. Nuclear structure and decay data.
Neon: NMR properties - 21Ne-NMR
[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.
[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.
[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.
[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).
More sources:
[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.
Last update: 2022-12-28
Perma link: https://www.chemlin.org/chemical-elements/neon-isotopes.php
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