Physics:Isotopes of neon

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Short description: Nuclides with atomic number of 10 but with different mass numbers
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(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.

List of isotopes

Nuclide
[n 1]
Z N Isotopic mass (u)
[n 2][n 3]
Half-life

[resonance width]
Decay
mode

[n 4]
Daughter
isotope

[n 5]
Spin and
parity
[n 6]
Physics:Natural abundance (mole fraction)
Excitation energy Normal proportion Range of variation
15Ne[1] 10 5 15.043170(70) 770(300) ys
[590(230) keV]
2p 13O (3/2−)
16Ne 10 6 16.025751(22) > 5.7 zs
[< 80 keV]
2p 14O 0+
17Ne[n 7] 10 7 17.0177140(4) 109.2(6) ms β+p (94.4(2.9)%) 16O 1/2−
β+α (3.51(1)%) 13N
β+ (2.1(2.9)%) 17F
β+pα (0.014(4)%) 12C
18Ne 10 8 18.0057087(4) 1664.20(47) ms β+ 18F 0+
19Ne 10 9 19.00188091(17) 17.2569(19) s β+ 19F 1/2+
20Ne 10 10 19.9924401753(16) Stable 0+ 0.9048(3) [0.8847, 0.9051][2]
21Ne 10 11 20.99384669(4) Stable 3/2+ 0.0027(1) [0.0027, 0.0171][2]
22Ne 10 12 21.991385114(19) Stable 0+ 0.0925(3) [0.0920, 0.0996][2]
23Ne 10 13 22.99446691(11) 37.15(3) s β 23Na 5/2+
24Ne 10 14 23.9936106(6) 3.38(2) min β 24mNa 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(3)%) 26Na 0+
βn (0.13(3)%) 25Na
27Ne 10 17 27.007570(100) 30.9(1.1) ms β (98.0(5)%) 27Na (3/2+)
βn (2.0(5)%) 26Na
β2n ?[n 8] 25Na ?
28Ne 10 18 28.012130(140) 18.8(2) ms β (84.3(1.1)%) 28Na 0+
βn (12(1)%) 27Na
β2n (3.7(5)%) 26Na
29Ne 10 19 29.019750(160) 14.7(4) ms β (68.0(5.1)%) 29Na (3/2−)
βn (28(5)%) 28Na
β2n (4(1)%) 27Na
30Ne 10 20 30.024990(270) 7.22(18) ms β (78.1(4.6)%) 30Na 0+
βn (13(4)%) 29Na
β2n (8.9(2.3)%) 28Na
31Ne 10 21 31.033470(290) 3.4(8) ms β 31Na (3/2−)
βn ?[n 8] 30Na ?
β2n ?[n 8] 29Na ?
32Ne 10 22 32.039720(540)# 3.5(9) ms β 32Na 0+
βn ?[n 8] 31Na ?
β2n ?[n 8] 30Na ?
33Ne?[n 9] 10 23 33.049520(640)# < 260 ns n ?[n 8] 32Ne 7/2−#
34Ne 10 24 34.056730(550)# 2 ms# [> 1.5 μs] β ?[n 8] 34Na 0+
β2n ?[n 8] 32Ne ?
βn ?[n 8] 33Ne ?
  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.
  8. 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 Decay mode shown is energetically allowed, but has not been experimentally observed to occur in this nuclide.
  9. This isotope has not yet been observed; given data is inferred or estimated from periodic trends.
  • The isotopic composition refers to that in air.

References

  1. Wamers, F.; Marganiec, J.; Aksouh, F.; Aksyutina, Yu.; Álvarez-Pol, H.; Aumann, T.; Beceiro-Novo, S.; Boretzky, K. et al. (4 April 2014). "First Observation of the Unbound Nucleus 15Ne". Physical Review Letters 112 (13): 132502. doi:10.1103/PhysRevLett.112.132502. PMID 24745409. http://publications.lib.chalmers.se/records/fulltext/198534/local_198534.pdf. 
  2. 2.0 2.1 2.2 Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; Bièvre, Paul De; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016-03-01). "Isotopic compositions of the elements 2013 (IUPAC Technical Report)" (in en). Pure and Applied Chemistry 88 (3): 293–306. doi:10.1515/pac-2015-0503. ISSN 1365-3075.