Physics:Isotopes of neon

From HandWiki
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. Jump up to: 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. Jump up to: 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.