About   |   More   |   Search

Isotopes of Fluorine

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

 

Fluorine isotopes

Fluorine is a monoisotopic element, i.e. there is only one stable isotope (19F) of the 18 known fluorine isotopes; all other isotopes are unstable radioisotopes.

Fluorine-19 makes up 100% of the naturally occurring fluorine. The nucleus is NMR active and is used for measurements in 19FNMR spectroscopy.

A fluorine radionuclide used by humans in cancer diagnostics and positron emission tomography is fluorine radionuclide the fluorine-18.

 

Isotope Table: Fluorine

 

Atomic Properties

Isotope
Nuclide
ZANNameAtomic Mass
[Nuclear Mass]
{Mass Excess}
Spin I
(h/2π)
μParent
123456789
14F9145Fluorine-1414.03432(4) u
[14.0293828 u]
{31.96887 MeV}
2-
15F9156Fluorine-1515.017785(15) u
[15.0128478 u]
{16.56662 MeV}
1/2+
16F9167Fluorine-1616.011466(9) u
[16.0065288 u]
{10.68051 MeV}
0-
17F9178Fluorine-1717.00209524(27) u
[16.9971581 u]
{1.9517 MeV}
5/2++4.7213(3)17Ne
18F9189Fluorine-1818.0009373(5) u
[17.9960001 u]
{0.87309 MeV}
1+18Ne
18mF9189Fluorine-18m18.0009373(5) u
[17.9960001 u]
{0.87309 MeV}
5+
19F91910Fluorine-1918.998403163(6) u
[18.993466 u]
{-1.48744 MeV}
1/2++2.628321(4)19Ne
19O
20F92011Fluorine-2019.99998125(3) u
[19.9950441 u]
{-0.01747 MeV}
2++2.09335(9)20O
21F92112Fluorine-2120.9999489(19) u
[20.9950117 u]
{-0.0476 MeV}
5/2+3.9194(12)21O
22F92213Fluorine-2222.002999(13) u
[21.9980618 u]
{2.79355 MeV}
(4+)2.6944(4)22O
23F92314Fluorine-2323.00353(4) u
[22.9985928 u]
{3.28817 MeV}
5/2+23O
24O
24F92415Fluorine-2424.0081(1) u
[24.0031628 u]
{7.5451 MeV}
(3+)24O
25F92516Fluorine-2525.01217(10) u
[25.0072328 u]
{11.33628 MeV}
5/2+
26F92617Fluorine-2626.02002(12) u
[26.0150828 u]
{18.64851 MeV}
1+
26mF92617Fluorine-26m26.02002(12) u
[26.0150828 u]
{18.64851 MeV}
(4+)
27F92718Fluorine-2727.02732(42) u
[27.0223828 u]
{25.44842 MeV}
(5/2+)
28F92819Fluorine-2828.03622(42) u
[28.0312828 u]
{33.73871 MeV}
29F92920Fluorine-2929.04310(56) u
[29.0381628 u]
{40.14739 MeV}
(5/2+)
30F93021Fluorine-3030.05165(64) u
[30.0467128 u]
{48.11167 MeV}
31F93122Fluorine-3131.06027(59) u
[31.0553328 u]
{56.14114 MeV}

 

Radioactive Decay Properties

IsotopeRadioactive DecayAEExtern
Half-lifeDecay ModeProbabilityEnergy
1101112131415
F-145.01 × 10-22 sp → 13OAL
F-156.91 × 10-22 sp → 14O100 %13.7 MeVAL
F-161.14 × 10-20/sup> sp → 15O100 %0.536 MeVAL
F-1764.49(16) sβ+17O100 %2.76046(25) MeVAL
F-18109.77(5) minβ+18O100 %1.6559(5) MeVAL
F-18m162(7) nsIso 18F100 %1121.36(15) keV
F-19stableAL
F-2011.07(6) sβ-20Ne100 %7.02447(3) MeVAL
F-214.158(20) sβ-21Ne100 %5.6842(18) MeVAL
F-224.23(4) sβ-22Ne
β-, n → 21Ne
> 89 %
< 11 %
10.818(12) MeV
0.454(12) MeV
AL
F-232.23(14) sβ-23Ne100 %8.46364 MeVAL
F-24390(70) msβ-24Ne
β-, n → 23Ne
> 94.1 %
< 5.9 %
13.51117 MeV
4.6422 MeV
AL
F-2580(9) msβ-25Ne
β-, n → 24Ne
76.9(45) %
23.1(45) %
13.42331 MeV
9.2438 MeV
AL
F-268.2(9) msβ-26Ne
β-, n → 25Ne
89(4) %
11(4) %
18.170(11) MeV
12.61(11) MeV
AL
F-26m2.2(1) msIso 26F
β- 26Ne
β-, n 25Ne
82 %
12 %
6 %


643.4(1) keV
F-275.0(2) msβ-27Ne
β-, n → 26Ne
23(21) %
77(21) %
17.5938 MeV
16.079 MeV
AL
F-2846 nsn → 27F100 %AL
F-290.0025(3) sβ-29Ne
β-, n → 28Ne
40 %
60 %
21.75(55) MeV
20.78(54) MeV
AL
F-30n ? AL
F-31260 nsβ- ?
β-, n ?
β-, 2n ?




AL

 

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 Fluorine isotope.
6 - Relative atomic mass of the Fluorine 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 Fluorine 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 Fluorine 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)
19F
100 %
1/2+
+2,628321(4)25,181-9,42(9)40,07760,83400
0,9413

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 Fluorine radionuclides:

NuclideLimit ValueHASS limitSCDaughter NuclidesHalf-life
F-18106 Bq10 Bq/g0,06 TBq1 Bq/cm2109.7 min

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

 

Literature Sources and References

Properties of the Fluorine 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.

Fluorine: NMR properties - 19F-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 ...