Fluorine-18

Fluorine-18, ¹⁸F

Decay over 24 hours
General
Symbol	18F
Names	fluorine-18, 18F, F-18, Fluorine-18
Protons (Z)	9
Neutrons (N)	9
Nuclide data
Natural abundance	Radioisotope
Half-life (t1/2)	109.771(20) min
Isotope mass	18.0009380(6) Da
Spin	1+
Excess energy	873.431±0.593 keV
Binding energy	137369.199±0.593 keV
Decay products	18O
Decay modes
Decay mode	Decay energy (MeV)
Positron emission (97%)	0.6335
Electron capture (3%)	1.6555
Isotopes of fluorine Complete table of nuclides

Fluorine-18 (¹⁸F) is a fluorine radioisotope which is an important source of positrons. It has a mass of 18.0009380(6) u and its half-life is 109.771(20) minutes. It decays by positron emission 96.7% of the time and electron capture 3.3% of the time. Both modes of decay yield stable oxygen-18.