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)
The abundances of the naturally occurring 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.
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+ | ||
- ^ mNe – Excited nuclear isomer.
- ^ ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
- ^ # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
- ^ Modes of decay:
n: Neutron emission p: Proton emission - ^ Bold symbol as daughter – Daughter product is stable.
- ^ ( ) spin value – Indicates spin with weak assignment arguments.
- ^ Has 2 halo protons.
- The isotopic composition refers to that in air.
References
- ^ 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.
- ^ 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. - ^ 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.
- ^ 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.