Isotopes of neon

Neon (10Ne) possesses three stable isotopes, 20Ne, 21Ne, and 22Ne. In addition, 17 radioactive isotopes have been discovered ranging from 15Ne to 34Ne, all short-lived. The longest-lived is 24Ne with a half-life of 3.38 minutes. All others are under a minute, most under a second. The least stable is 15Ne with a half-life of 7.7×10−22 s. See isotopes of carbon for notes about the measurement.

Main isotopes of neon (10Ne)
Iso­tope Decay
abun­dance half-life (t1/2) mode pro­duct
20Ne 90.48% stable
21Ne 0.27% stable
22Ne 9.25% stable
Standard atomic weight Ar, standard(Ne)
The abundances of the naturally occurring isotopes of neon

List of isotopes
Nuclide[2]
[n 1]		 Z N Isotopic mass (Da)[3]
[n 2][n 3]		 Half-life

[resonance width]		 Decay
mode
[n 4]		 Daughter
isotope
[n 5]		 Spin and
parity
[n 6]		 Natural abundance (mole fraction)
Excitation energy Normal proportion Range of variation
15Ne[4] 10 5 15.04317(7) 7.7(3)×10−22 s
[0.59(23)−
2.522(60) MeV]		 2p 13O (3/2−)
16Ne 10 6 16.025751(22) > 5.7×10−21 s
[122(37) keV]		 2p 14O 0+
17Ne[n 7] 10 7 17.0177140(4) 109.2(6) ms β+, p (96.0%) 16O 1/2−
β+, α (2.7%) 13N
β+ (1.3%) 17F
18Ne 10 8 18.0057087(4) 1.66420(47) s β+ 18F 0+
19Ne 10 9 19.00188090(17) 17.274(10) s β+ 19F 1/2+
20Ne 10 10 19.9924401762(17) 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 21.991385110(19) Stable 0+ 0.0925(3) 0.0920–0.0996
23Ne 10 13 22.99446690(11) 37.140(28) 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%) 26Na 0+
β−, n (0.13%) 25Na
27Ne 10 17 27.00757(10) 31.5(13) ms β− (98.0%) 27Na (3/2+)
β−, n (2.0%) 26Na
28Ne 10 18 28.01213(14) 20(1) ms β− (84.3%) 28Na 0+
β−, n (12.0%) 27Na
β−, 2n (3.7%) 26Na
29Ne 10 19 29.01975(16) 14.7(4) ms β− (68%) 29Na (3/2−)
β−, n (28%) 28Na
β−, 2n (4%) 27Na
30Ne 10 20 30.02499(27) 7.22(18) ms β− 30Na (78.1%) 0+
β−, n (13.0%) 29Na
β−, 2n (8.9%) 28Na
31Ne 10 21 31.03347(29) 3.4(8) ms β− 31Na (3/2−)
β−, n 30Na
32Ne 10 22 32.03972(54)# 3.5(9) ms β− 32Na 0+
β−, n 31Na
34Ne 10 24 34.05673(55)# 1# ms [>1.5 µs] β− 34Na 0+
  1. mNe – Excited nuclear isomer.
  2. ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. Modes of decay:
    n:Neutron emission
    p:Proton emission
  5. Bold symbol as daughter – Daughter product is stable.
  6. ( ) spin value – Indicates spin with weak assignment arguments.
  7. Has 2 halo protons.
  • The isotopic composition refers to that in air.
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References
  1. Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
  2. Half-life, decay mode, nuclear spin, and isotopic composition is sourced in:
    Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001.
  3. Wang, M.; Audi, G.; Kondev, F. G.; Huang, W. J.; Naimi, S.; Xu, X. (2017). "The AME2016 atomic mass evaluation (II). Tables, graphs, and references" (PDF). Chinese Physics C. 41 (3): 030003-1–030003-442. doi:10.1088/1674-1137/41/3/030003.
  4. Wamers, F.; Marganiec, J.; Aksouh, F.; Aksyutina, Yu.; Álvarez-Pol, H.; Aumann, T.; Beceiro-Novo, S.; Boretzky, K.; Borge, M. J. G.; Chartier, M.; Chatillon, A.; Chulkov, L. V.; Cortina-Gil, D.; Emling, H.; Ershova, O.; Fraile, L. M.; Fynbo, H. O. U.; Galaviz, D.; Geissel, H.; Heil, M.; Hoffmann, D. H. H.; Johansson, H. T.; Jonson, B.; Karagiannis, C.; Kiselev, O. A.; Kratz, J. V.; Kulessa, R.; Kurz, N.; Langer, C.; Lantz, M.; Le Bleis, T.; Lemmon, R.; Litvinov, Yu. A.; Mahata, K.; Müntz, C.; Nilsson, T.; Nociforo, C.; Nyman, G.; Ott, W.; Panin, V.; Paschalis, S.; Perea, A.; Plag, R.; Reifarth, R.; Richter, A.; Rodriguez-Tajes, C.; Rossi, D.; Riisager, K.; Savran, D.; Schrieder, G.; Simon, H.; Stroth, J.; Sümmerer, K.; Tengblad, O.; Weick, H.; Wimmer, C.; Zhukov, M. V. (4 April 2014). "First Observation of the Unbound Nucleus 15Ne" (PDF). Physical Review Letters. 112 (13): 132502. doi:10.1103/PhysRevLett.112.132502 – via APS.
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