Fluorine-29

Properties and data of the isotope ²⁹F.

Content

General data

Name of the isotope:Fluorine-29; F-29Symbol:²⁹F or 299FMass number A:29 (= number of nucleons)Atomic number Z:9 (= number of protons)Neutrons N:20Isotopic mass:29.04310(56) u (atomic weight of Fluorine-29)Nuclide mass:29.0381628 u (calculated nuclear mass without electrons)Mass excess:40.14739 MeVMass defect:0.200623608 u (per nucleus)Nuclear binding energy:186.87968711 MeV (per nucleus)
6.44412714 MeV (average binding energy per nucleon)Separation energy:S_N = 1.66(66) MeV (first neutron)
S_P = 19.22(87) MeV (first proton)Half-life:0.0025(3) sDecay constant λ:277.25887222398 s^-1Specific activity α:5.757558562758 × 10⁺²⁴ Bq g^-1
1.556096908853 × 10⁺¹⁴ Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Year of discovery:1989

Radioactive Decay

Half-life T_½ = 0.0025(3) s respectively 2.5 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²⁹Ne	40 %	21.75(55) MeV
β^-, n	²⁸Ne	60 %	20.78(54) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 20) and isobaric (same nucleon number A = 29) with Fluorine-29. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 20	Isobar A = 29
8	²⁸O
9	²⁹F	²⁹F
10	³⁰Ne	²⁹Ne
11	³¹Na	²⁹Na
12	³²Mg	²⁹Mg
13	³³Al	²⁹Al
14	³⁴Si	²⁹Si
15	³⁵P	²⁹P
16	³⁶S	²⁹S
17	³⁷Cl	²⁹Cl
18	³⁸Ar
19	³⁹K
20	⁴⁰Ca
21	⁴¹Sc
22	⁴²Ti
23	⁴³V
24	⁴⁴Cr
25	⁴⁵Mn
26	⁴⁶Fe
27	⁴⁷Co
28	⁴⁸Ni