Fluorine-26m
Properties and data of the isotope 26mF.
See also: list of Fluorine isotopes.
General data
Name of the isotope:Fluorine-26m; F-26mSymbol:26mF or 26m9FMass number A:26 (= number of nucleons)Atomic number Z:9 (= number of protons)Neutrons N:17Isotopic mass:26.020050(110) u (atomic weight of Fluorine-26m)
Excitation energy: 643.4(1) keVNuclide mass:26.0151128 u (calculated nuclear mass without electrons)Mass excess:18.67645 MeVMass defect:0.19767886 u (per nucleus)Nuclear binding energy:184.13667202 MeV (per nucleus)
7.08217969 MeV (average binding energy per nucleon)Half-life:2.2(1) msDecay constant λ:315.06690025452 s-1Specific activity α:7.297604821678 × 10+24 Bq g-1
1.972325627480 × 10+14 Ci g-1Spin and parity:
(nuclear angular momentum)(4+)
Radioactive Decay
Half-life T½ = 2.2(1) ms respectively 2.2 × 10-3 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| Iso | 26F | 82(11) % | | 0.6434(1) MeV [34(5) %] |
| β- | 26Ne | ? | | |
| β-, n | 25Ne | 12(8) % | | |
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 26F | | 8.2(9) ms | 1+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 26) with Fluorine-26m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 17 | Isobar A = 26 |
|---|
| 7 | 24N | |
| 8 | 25O | 26O |
| 9 | 26F | 26F |
| 10 | 27Ne | 26Ne |
| 11 | 28Na | 26Na |
| 12 | 29Mg | 26Mg |
| 13 | 30Al | 26Al |
| 14 | 31Si | 26Si |
| 15 | 32P | 26P |
| 16 | 33S | 26S |
| 17 | 34Cl | |
| 18 | 35Ar | |
| 19 | 36K | |
| 20 | 37Ca | |
| 21 | 38Sc | |
| 22 | 39Ti | |
| 23 | 40V | |
| 24 | 41Cr | |
| 25 | 42Mn | |
Last update: 2024-10-21
Perma link: https://www.chemlin.org/isotope/fluorine-26m
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