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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(2) min. All others are under a minute, most under a second. The least stable is 15Ne with a half-life of 770(300) ys (7.7(3.0)×10−22 s). See isotopes of carbon for notes about the measurement. Light radioactive neon isotopes usually decay to fluorine or oxygen, while heavier ones decay to sodium.

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List of isotopes

Nuclide1ZNIsotopic mass (Da)234Half-life5[resonance width]Decaymode67Daughterisotope8Spin andparity910Natural abundance (mole fraction)
Excitation energyNormal proportion11Range of variation
15Ne1210515.043170(70)770(300) ys[590(230) keV]2p13O(3/2−)
16Ne10616.025751(22)> 5.7 zs[< 80 keV]2p14O0+
17Ne1310717.0177140(4)109.2(6) msβ+p (94.4(2.9)%)16O1/2−
β+α (3.51(1)%)13N
β+ (2.1(2.9)%)17F
β+pα (0.014(4)%)12C
18Ne10818.0057087(4)1664.20(47) msβ+18F0+
19Ne10919.00188091(17)17.2569(19) sβ+19F1/2+
20Ne101019.9924401753(16)Stable0+0.9048(3)[0.8847, 0.9051]14
21Ne101120.99384669(4)Stable3/2+0.0027(1)[0.0027, 0.0171]15
22Ne101221.991385114(19)Stable0+0.0925(3)[0.0920, 0.0996]16
23Ne101322.99446691(11)37.15(3) sβ−23Na5/2+
24Ne101423.9936106(6)3.38(2) minβ−24Na0+
25Ne101524.997810(30)602(8) msβ−25Na1/2+
26Ne101626.000516(20)197(2) msβ− (99.87(3)%)26Na0+
β−n (0.13(3)%)25Na
27Ne101727.007570(100)30.9(1.1) msβ− (98.0(5)%)27Na(3/2+)
β−n (2.0(5)%)26Na
β−2n ?1725Na ?
28Ne101828.012130(140)18.8(2) msβ− (84.3(1.1)%)28Na0+
β−n (12(1)%)27Na
β−2n (3.7(5)%)26Na
29Ne101929.019750(160)14.7(4) msβ− (68.0(5.1)%)29Na(3/2−)
β−n (28(5)%)28Na
β−2n (4(1)%)27Na
30Ne102030.024990(270)7.22(18) msβ− (78.1(4.6)%)30Na0+
β−n (13(4)%)29Na
β−2n (8.9(2.3)%)28Na
31Ne102131.033470(290)3.4(8) msβ−31Na(3/2−)
β−n ?1830Na ?
β−2n ?1929Na ?
32Ne102232.039720(540)#3.5(9) msβ−32Na0+
β−n ?2031Na ?
β−2n ?2130Na ?
34Ne102434.056730(550)#2 ms# [> 1.5 μs]β− ?2234Na0+
β−2n ?2332Na ?
β−n ?2433Na ?
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  • The isotopic composition refers to that in air.

References

  1. mNe – Excited nuclear isomer. /wiki/Nuclear_isomer ↩

  2. Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*". Chinese Physics C. 45 (3): 030003. doi:10.1088/1674-1137/abddaf. /wiki/Doi_(identifier) ↩

  3. ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits. ↩

  4. # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS). ↩

  5. Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae. https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf ↩

  6. Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae. https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf ↩

  7. Modes of decay: n:Neutron emissionp:Proton emission /wiki/Neutron_emission ↩

  8. Bold symbol as daughter – Daughter product is stable. ↩

  9. Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae. https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf ↩

  10. ( ) spin value – Indicates spin with weak assignment arguments. ↩

  11. Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae. https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf ↩

  12. 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. PMID 24745409 – via APS. http://publications.lib.chalmers.se/records/fulltext/198534/local_198534.pdf ↩

  13. Has 2 halo protons. /wiki/Halo_nucleus ↩

  14. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; Bièvre, Paul De; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna; Loss, Robert D.; Walczyk, Thomas; Prohaska, Thomas (2016-03-01). "Isotopic compositions of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 293–306. doi:10.1515/pac-2015-0503. hdl:11858/00-001M-0000-0029-C408-7. ISSN 1365-3075. S2CID 104472050. https://doi.org/10.1515%2Fpac-2015-0503 ↩

  15. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; Bièvre, Paul De; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna; Loss, Robert D.; Walczyk, Thomas; Prohaska, Thomas (2016-03-01). "Isotopic compositions of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 293–306. doi:10.1515/pac-2015-0503. hdl:11858/00-001M-0000-0029-C408-7. ISSN 1365-3075. S2CID 104472050. https://doi.org/10.1515%2Fpac-2015-0503 ↩

  16. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; Bièvre, Paul De; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna; Loss, Robert D.; Walczyk, Thomas; Prohaska, Thomas (2016-03-01). "Isotopic compositions of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 293–306. doi:10.1515/pac-2015-0503. hdl:11858/00-001M-0000-0029-C408-7. ISSN 1365-3075. S2CID 104472050. https://doi.org/10.1515%2Fpac-2015-0503 ↩

  17. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  18. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  19. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  20. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  21. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  22. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  23. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩

  24. Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide. ↩