# Neon: isotope data

The three Neon isotopes are used for various purposes. Ne-22 is used for the production of the medical radioisotope Na-22. Ne-20 can be used for the production of F-18, although the route via O-18 is by far the most commonly used. Ne-21 has been used in Masers to study quantum physics.

## Naturally occurring isotopes

This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments. Further data for radioisotopes (radioactive isotopes) of neon are listed (including any which occur naturally) below.
Isotope Mass / Da Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
20Ne 19.9924356 (22) 90.48 (3) 0 0
21Ne 20.9938428 (21) 0.27 (1) 3/2 -0.661796
22Ne 21.9913831 (18) 9.25 (3) 0 0

In the above, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which totals 100% for all the naturally occurring isotopes.

Further data for naturally occuring isotopes of neon are listed above. This table gives information about some radiosotopes of neon, their masses, their half-lives, their modes of decay, their nuclear spins, and their nuclear magnetic moments.
Isotope Mass / Da Half-life Mode of decay Nuclear spin Nuclear magnetic moment
18Ne 18.005710 1.67 s EC to 18F 0
19Ne 19.001880 17.22 s EC to 19F 1/2 -1.885
23Ne 22.994465 37.2 s β- to 23Na 3/2 -1.08
24Ne 23.993613 3.38 m β- to 24Na 0
25Ne 24.99769 0.61 s β- to 25Na 1/2

## Sheffield ChemPuter isotope pattern calculator

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### References

1. Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in Isotopic Compositions of the Elements 1989, Pure and Applied Chemistry, 1998, 70, 217. [Copyright 1998 IUPAC]
2. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides
3. Masses, nuclear spins, and magnetic moments: I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in Quantities, Units and Symbols in Physical Chemistry, Blackwell Scientific Publications, Oxford, UK, 1988. [Copyright 1988 IUPAC]

## NMR Properties of neon

Common reference compound: Neon gas, 1.1 MPa.

Isotope 1 Isotope 2 Isotope 21Ne Natural abundance /% 0.27 Spin (I) 3/2 Frequency relative to 1H = 100 (MHz) 7.894296 Receptivity, DP, relative to 1H = 1.00 0.00000665 Receptivity, DC, relative to 13C = 1.00 0.0391 Magnetogyric ratio, γ (107 rad T‑1 s-1) -2.11308 Magnetic moment, μ (μN) -0.854376 Nuclear quadrupole moment, Q/millibarn 101.55(75) Line width factor, 1056 l (m4) 140

### References

1. R.K. Harris in Encyclopedia of Nuclear Magnetic Resonance, D.M. Granty and R.K. Harris, (eds.), vol. 5, John Wiley & Sons, Chichester, UK, 1996. I am grateful to Professor Robin Harris (University of Durham, UK) who provided much of the NMR data, which are copyright 1996 IUPAC, adapted from his contribution contained within this reference.
2. J. Mason in Multinuclear NMR, Plenum Press, New York, USA, 1987. Where given, data for certain radioactive nuclei are from this reference.
3. P. Pyykkö, Mol. Phys., 2008, 106, 1965-1974.
4. P. Pyykkö, Mol. Phys., 2001, 99, 1617-1629.
5. P. Pyykkö, Z. Naturforsch., 1992, 47a, 189. I am grateful to Professor Pekka Pyykkö (University of Helsinki, Finland) who provided the nuclear quadrupole moment data in this and the following two references.
6. D.R. Lide, (ed.), CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
7. P. Pyykkö, personal communication, 1998, 204, 2008, 2010.

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