Neon-17

Properties and data of the isotope ¹⁷Ne.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

Neon-17 is a radioisotope of the chemical element neon, which has 7 neutrons in its atomic nucleus in addition to the element-specific 10 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 17. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of ¹⁷Ne is exclusively for academic purposes and experimental research.

The proton-rich unstable isotope was first described in the literature in 1963 [1].

See also: List of individual Neon isotopes (and general data sources).

General data

Name of the isotope:Neon-17; Ne-17Symbol:¹⁷Ne or 1710NeMass number A:17 (= number of nucleons)Atomic number Z:10 (= number of protons)Neutrons N:7Isotopic mass:17.0177140(4) u (atomic weight of Neon-17)Nuclide mass:17.0122282 u (calculated nuclear mass without electrons)Mass excess:16.50048 MeVMass defect:0.121190732 u (per nucleus)Nuclear binding energy:112.88843971 MeV (per nucleus)
6.64049645 MeV (average binding energy per nucleon)Separation energy:S_N = 15.558(20) MeV (first neutron)
S_P = 1.464(5) MeV (first proton)Half-life:109.2(6) msDecay constant λ:6.3475016534794 s^-1Specific activity α:2.248561709760 × 10⁺²³ Bq g^-1
6077193810164.3 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Isobaric spin: 3/2Magnetic dipole moment:μ(μ_N) = +0.7873(14)Nuclear g-factor:g_l = 1.5746Charge radius:3.0413(88) femtometer fmMirror nucleus:Nitrogen-17Year of discovery:1963

Radioactive Decay

Half-life T_½ = 109.2(6) ms respectively 1.092 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy
EC/β⁺	¹⁷F	2.09 %	14.5487(4) MeV
β⁺, p	¹⁶O	94.4(29) %	13.909 MeV
β⁺, α	¹³C	3.51(1) %	8,691 MeV

Parent Nuclides

Direct parent isotope is: ¹⁹Mg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 7) and isobaric (same nucleon number A = 17) with Neon-17. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 7	Isobar A = 17
2	⁹He
3	¹⁰Li
4	¹¹Be
5	¹²B	¹⁷B
6	¹³C	¹⁷C
7	¹⁴N	¹⁷N
8	¹⁵O	¹⁷O
9	¹⁶F	¹⁷F
10	¹⁷Ne	¹⁷Ne
11	¹⁸Na	¹⁷Na
12	¹⁹Mg
13	²⁰Al

External data and identifiers

Adopted Levels, Gammas:NuDat 17Ne

Literature and References

[1] - R. Barton et al.:
Observation of delayed proton radioactivity.
In: Canadian Journal of Physics, 41(12), (1963), DOI 10.1139/p63-201.

[2] - R. Kanungo, M. Chiba, B. Abu-Ibrahim et al.:
Observation of a two-proton halo in ¹⁷Ne.
In: The European Physical Journal A - Hadrons and Nuclei, (2005), DOI 10.1140/epjad/i2005-06-184-y.

[3] - C. Lehr, F. Wamers, F. Aksouh et al.:
Unveiling the two-proton halo character of ¹⁷Ne: Exclusive measurement of quasi-free proton-knockout reactions.
In: Physics Letters B, 827, 136957, (2022), DOI 10.1016/j.physletb.2022.136957.