About   |   More   |   Search

Isotopes of Sodium

List, data and properties of all known isotopes of Sodium as well as radioactive decay products and intermediate products.

 

Sodium isotopes

Sodium is a monoisotopic and mononuclide element: only one stable isotope of sodium 23Na occurs in nature. All other known isotopes are unstable.

 

Isotope Table: Sodium

 

Atomic Properties

Isotope
Nuclide
ZANNameAtomic Mass
[Nuclear Mass]
{Mass Excess}
Spin I
(h/2π)
μParent
123456789
18Na11187Sodium-1818.02688(10) u
[18.0208457 u]
{25.03856 MeV}
(1-)
19Na11198Sodium-1919.013880(11) u
[19.0078457 u]
{12.92914 MeV}
(5/2+)
20Na11209Sodium-2020.0073544(12) u
[20.0013201 u]
{6.85058 MeV}
2++ 0.3694(2)20Mg
21Na112110Sodium-2120.9976547(1) u
[20.9916204 u]
{-2.18463 MeV}
3/2++2.38610(4)21Mg
22Al
23Si
22Na112211Sodium-2221.99443742(18) u
[21.9884031 u]
{-5.18151 MeV}
3++ 1.746(3)22Mg
23Al
22m1Na112211Sodium-22m121.99443742(18) u
[21.9884031 u]
{-5.18151 MeV}
1++0.535(10)
22m2Na112211Sodium-22m221.99443742(18) u
[21.9884031 u]
{-5.18151 MeV}
0+
23Na112312Sodium-2322.98976928(2) u
[22.9837349 u]
{-9.52985 MeV}
3/2++2.21750(3)23Mg
23Ne
24Na112413Sodium-2423.990963011(18) u
[23.9849287 u]
{-8.4179 MeV}
4++ 1.6903(8)24Ne
24mNa112413Sodium-24m23.990963011(18) u
[23.9849287 u]
{-8.4179 MeV}
1+- 1.931(3)
25Na112514Sodium-2524.9899540(13) u
[24.9839197 u]
{-9.35779 MeV}
5/2++ 3.683(4)25Ne
26Na112615Sodium-2625.992635(4) u
[25.9866007 u]
{-6.86045 MeV}
3++ 2.851(2)26Ne
26mNa112615Sodium-26m25.992635(4) u
[25.9866007 u]
{-6.86045 MeV}
1+
27Na112716Sodium-2726.994076(4) u
[26.9880417 u]
{-5.51817 MeV}
5/2++ 3.895(5)
28Na112817Sodium-2827.998939(11) u
[27.9929047 u]
{-0.98832 MeV}
1++ 2.426(3)28Ne
29Na112918Sodium-2929.002877(8) u
[28.9968427 u]
{2.67991 MeV}
3/2++ 2.449(8)29Ne
30Na113019Sodium-3030.009098(5) u
[30.0030637 u]
{8.47473 MeV}
2++ 2.083(10)30Ne
31Na113120Sodium-3131.013147(15) u
[31.0071127 u]
{12.24635 MeV}
3/2(+)+ 2.305(8)
32Na113221Sodium-3232.02001(4) u
[32.0139757 u]
{18.63919 MeV}
(3-,4-)32Ne
33Na113322Sodium-3333.02553(48) u
[33.0194957 u]
{23.78104 MeV}
(3/2+)
34Na113423Sodium-3434.03401(64) u
[34.0279757 u]
{31.68011 MeV}
1+34Ne
35Na113524Sodium-3535.04104(72) u
[35.0350057 u]
{38.22851 MeV}
(3/2+)
36Na113625Sodium-3636.04971(73) u
[36.0436757 u]
{46.30457 MeV}
37Na113726Sodium-3737.05747(74) u
[37.0514357 u]
{53.53296 MeV}
3/2+
38Na113827Sodium-38
39Na113928Sodium-3939 u
[38.9939657 u]
{0 MeV}

 

Radioactive Decay Properties

IsotopeRadioactive DecayAEExtern
Half-lifeDecay ModeProbabilityEnergy
1101112131415
Na-182.28 × 10-21 sp → 17Ne
β+18Ne
> 99.9 %
< 0.1 %

AL
Na-191.14 × 10-20 sp → 18Ne100 %0.832 MeVAL
Na-20447.9(23) msβ+20Ne
β+, α → 16O
79.95(20) %
20.05(20) %
13.8925(11) MeV
9.160 MeV
AL
Na-2122.49(4) sβ+21Ne100 %3.54714(10) MeVAL
Na-222.6018(22) aEC β< 22Ne100 %2.84321(17) MeVAL
Na-22m1243(2) nsIso → 22Na583.05(10) keVAL
Na-22m219.6(7) psIso → 22Na657.00(14) keVAL
Na-23stableAL
Na-2414.997(12) hβ-24Mg100 %5.515669(21) MeVAL
Na-24m20.18(10) msβ-24Mg
Iso → 24Na
ca. 0.05 %
ca. 99.95 %
5.988 MeV
472.2074(8) keVAL
Na-2559.1(6) sβ-25Mg100 %3.8350(12) MeVAL
Na-261.07128(25) sβ-26Mg100 %9.354(4) MeVAL
Na-26m9(2) μsIso → 26Na100 %82.2(6) keV
Na-27301(6) msβ-27Mg
β-, n → 26Mg
98.7 %
0.13(4) %
9.06898 MeV
2.6256 MeV
AL
Na-2830.5(4) msβ-28Mg
β-, n → 27Mg
99.42 %
0.58(12) %
14.031(10) MeV
5.527(10) MeV
AL
Na-2944.1(9) msβ-29Mg
β-, n → 28Mg
78.5(30) %
21.5(30) %
13.27249 MeV
9.6170 MeV
AL
Na-3048(2) msβ-30Mg
β-, n → 29Mg
β-, 2n → 28Mg
β-, α → 26Ne
68.85 %
30(4) %
1.15 %
0.000055 %
17.272 MeV
10.909 MeV
7.237 MeV
5.507 MeV
AL
Na-3117.35(40) msβ-31Mg
β-, n → 30Mg
β-, 2n → 29Mg
β-, 3n → 28Mg
62.05 %
37.3 %
0.87 %
> 0.05 %
15.872 MeV
13.494 MeV
7.131 MeV
3.459 MeV
AL
Na-3213.2(4) msβ-32Mg
β-, n → 31Mg
β-, 2n → 30Mg
68 %
24(7) %
8.3 %
20.019 MeV
14.211 MeV
11.833 MeV
AL
Na-338.0(4) msβ-33Mg
β-, n → 32Mg
β-, 2n → 31Mg
40 %
47(6) %
13(3) %
19.995 MeV
17.773 MeV
11.964 MeV
AL
Na-345.5(10) msβ-34Mg
β-, n → 33Mg
β-, 2n → 32Mg
ca. 35 %
ca. 15 %
ca. 50 %
23.952 MeV
19.796 MeV
17.573 MeV
AL
Na-351.8(5) msβ-35Mg
β-, n → 34Mg
β-, xn


23.430 MeV
22.702 MeV
AL
Na-36180 nsn ? AL
Na-3760 nsβ- ?
β-, n ?


AL
Na-38noch unentdeckt
Na-39β-, n 38Mg

 

Notes (related to the columns):

1 - nuclide, isotope symbol.
2 - Z = number of protons (atomic number).
3 - Mass number A.
4 - N = number of neutrons.
5 - Identification of the Sodium isotope.
6 - Relative atomic mass of the Sodium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
7 - Nuclear spin I, unit: h/2π.
8 - Nuclear magnetic moment μmag.
9 - Source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
10 - Decay: Half-live of the Sodium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
11 - Decay: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
12 - Decay percentage in percent (%).
13 - Decay energy; Particle energy related to decay type.
14 - AE = Excitation energy for metastable nuclei.
15 - Other information and notes: AL = Adopted Levels (link to external data [1]).

Miscellaneous:

()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
  - unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.

 

NMR active Sodium nuclides

Nuclide
quantity 1)
spin
Nuclear magnetic
moment
μ/μN
Gyromagnetic
ratio
107 rad T-1 s-1
Quadrupole
moment
Q fm-2
Resonant
frequency
v0 bei 1 T
Relative
sensitivity
H0 = const.
v0 = const. 2)
23Na
100 %
3/2+
+2,21750(3)7,080110,4(1)11,26880,09270
1,3234

1) Quantity Percentage of natural occurrence.

2) Related to 1H = 1,000.

 

Radiation Protection

According to the Radiation Protection Ordinance (StrlSchV 2018, Germany), the following values (columns 1 to 7) apply to the handling of Sodium radionuclides:

NuclideLimit ValueHASS limitSCDaughter NuclidesHalf-life
Na-22106 Bq10 Bq/g0,03 TBq1 Bq/cm22.6 a
Na-24105 Bq1 Bq/g0,02 TBq1 Bq/cm215.0 h

(HASS = High-Activity Sealed Radioactive Sources; SC = surface contamination)

 

Literature Sources and References

Properties of the Sodium nucleides

[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.

[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.

[3] - Live Chart of Nuclides. Nuclear structure and decay data.

Sodium: NMR properties - 23Na-NMR

[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.

[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.

[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.

[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).

More sources:

[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.

 


Category: Isotopes

Last update: 05.07.2020



© 1996 - 2022 Internetchemistry




I agree!

This site uses cookies. By using this website, you agree to the use of cookies! Learn more ...