¹¹O — Unstable · unbound · Decay: p emission · Type: unbound · Uses: research. (www-nds.iaea.org)
¹²O — Unstable · τ ~ 10⁻²¹ s (unbound) · Decay: 2p emission → ¹⁰N/¹¹N · Type: unbound · Uses: research. (www-nds.iaea.org)
¹³O — Unstable · t½ ≈ 8.6 ms · Decay: β⁺ → ¹³N · Type: synthetic · Uses: decay-scheme tests. (www-nds.iaea.org)
¹⁴O — Unstable · t½ ≈ 70.6 s · Decay: β⁺ → ¹⁴N · Type: cyclotron radionuclide · Uses: PET-physiology research. (PubMed)
¹⁵O — Unstable · t½ ≈ 122 s · Decay: β⁺ → ¹⁵N · Type: cyclotron PET radionuclide · Uses: H₂¹⁵O PET for perfusion/CBF (fast repeat scans). (ScienceDirect, Wikipedia)
¹⁶O — Stable · — · Type: stable (primordial) · Uses: bulk oxygen; activation in reactors yields ¹⁶N. (ScienceDirect)
¹⁷O — Stable · — · Type: stable (primordial) · Uses: ¹⁷O-NMR/MRI metabolic and perfusion studies; tracer water. (PMC, News-Medical)
¹⁸O — Stable · — · Type: stable (primordial) · Uses: H₂¹⁸O target to make ¹⁸F for PET; isotope hydrology/paleoclimate. (nuclearsystem.com, Tn Sanso, irisotope.com)
¹⁹O — Unstable · t½ ≈ 26.9 s · Decay: β⁻ → ¹⁹F · Type: synthetic · Uses: research. (www-nds.iaea.org)
²⁰O — Unstable · t½ ≈ 13.5 s · Decay: β⁻ → ²⁰F · Type: synthetic · Uses: research. (www-nds.iaea.org)
²¹O — Unstable · t½ ≈ 3.4 s · Decay: β⁻ → ²¹F · Type: synthetic · Uses: research. (www-nds.iaea.org)
²²O — Unstable · t½ ≈ 2.25 s · Decay: β⁻ → ²²F · Type: synthetic · Uses: shell-closure systematics. (www-nds.iaea.org)
²³O — Unstable · t½ ≈ 82 ms · Decay: β⁻ (βn) → ²³F/²²F · Type: synthetic · Uses: research. (www-nds.iaea.org)
²⁴O — Unstable · t½ ≈ 61 ms · Decay: β⁻ → ²⁴F · Type: very neutron-rich, doubly magic N=16 candidate · Uses: shell evolution tests. (www-nds.iaea.org)
²⁵O — Unstable · unbound · Decay: n emission · Type: unbound · Uses: research. (www-nds.iaea.org)
²⁶O — Unstable · unbound (2n emission) · Decay: 2n → ²⁴O · Type: unbound; dineutron correlation · Uses: research. (www-nds.iaea.org)
²⁷O — Unstable · unbound · Decay: n emission · Type: unbound · Uses: research. (www-nds.iaea.org)
²⁸O — Unstable · unbound (near drip line) · Decay: multi-n emission · Type: unbound · Uses: research. (www-nds.iaea.org)
Oxygen — isotope count: 17 total · Stable: 3 (¹⁶O, ¹⁷O, ¹⁸O) · Unstable: 14. (IDs/half-lives: IAEA LiveChart; PET/¹⁷O/¹⁸O uses as cited.) (www-nds.iaea.org)