Oxygen-14

Properties and data of the isotope ¹⁴O.

Content

General data

Name of the isotope:Oxygen-14; O-14Symbol:¹⁴O or 148OMass number A:14 (= number of nucleons)Atomic number Z:8 (= number of protons)Neutrons N:6Isotopic mass:14.008596706(27) u (atomic weight of Oxygen-14)Nuclide mass:14.0042081 u (calculated nuclear mass without electrons)Mass excess:8.00778 MeVMass defect:0.105993046 u (per nucleus)Nuclear binding energy:98.73188639 MeV (per nucleus)
7.0522776 MeV (average binding energy per nucleon)Separation energy:S_N = 23.179(10) MeV (first neutron)
S_P = 4.62667(27) MeV (first proton)Half-life:70.620(15) sDecay constant λ:0.0098151682322281 s^-1Specific activity α:4.222023261318 × 10⁺²⁰ Bq g^-1
11410873679.238 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Isobaric spin: 1Mirror nucleus:Carbon-14Year of discovery:1949

Radioactive Decay

Half-life T_½ = 70.620(15) s respectively 7.0620 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	¹⁴N	100 %	5.144364(25) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 6) and isobaric (same nucleon number A = 14) with Oxygen-14. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.