Fluorine-27
Properties and data of the isotope 27F.
See also: list of Fluorine isotopes.
General data
Name of the isotope:Fluorine-27; F-27Symbol:27F or 279FMass number A:27 (= number of nucleons)Atomic number Z:9 (= number of protons)Neutrons N:18Isotopic mass:27.02732(42) u (atomic weight of Fluorine-27)Nuclide mass:27.0223828 u (calculated nuclear mass without electrons)Mass excess:25.44842 MeVMass defect:0.199073776 u (per nucleus)Nuclear binding energy:185.4360279 MeV (per nucleus)
6.86800103 MeV (average binding energy per nucleon)Separation energy:SN = 1.27(41) MeV (first neutron)
SP = 16.50(42) MeV (first proton)Half-life:5.0(2) msDecay constant λ:138.62943611199 s-1Specific activity α:3.092022191111 × 10+24 Bq g-1
83568167327327 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2+)Year of discovery:1981
Radioactive Decay
Half-life T½ = 5.0(2) ms respectively 5.0 × 10-3 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 27Ne | 23(21) % | 17.5938 MeV | |
β-, n | 26Ne | 77(21) % | 16.079 MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 18) and isobaric (same nucleon number A = 27) with Fluorine-27. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 18 | Isobar A = 27 |
7 | 25N | |
8 | 26O | 27O |
9 | 27F | 27F |
10 | 28Ne | 27Ne |
11 | 29Na | 27Na |
12 | 30Mg | 27Mg |
13 | 31Al | 27Al |
14 | 32Si | 27Si |
15 | 33P | 27P |
16 | 34S | 27S |
17 | 35Cl | |
18 | 36Ar | |
19 | 37K | |
20 | 38Ca | |
21 | 39Sc | |
22 | 40Ti | |
23 | 41V | |
24 | 42Cr | |
25 | 43Mn | |
External data and identifiers
Last update: 2020-10-12
Perma link: https://www.chemlin.org/isotope/fluorine-27
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