Isotopes of neon

From Wikipedia, the free encyclopedia
  (Redirected from Neon-18)
Jump to navigation Jump to search
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

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[edit]

Nuclide[2]
[n 1]
Z N Isotopic mass (u)[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.

References[edit]

  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.