²⁵⁵Db — Unstable · t½ ≈ 1.6 s · Decay: α → ²⁵¹Lr · Type: synthetic · Uses: research.
²⁵⁶Db — Unstable · t½ ≈ 1.6 s · Decay: α → ²⁵²Lr · Type: synthetic · Uses: research.
²⁵⁷Db — Unstable · t½ ≈ 1.5 s · Decay: α → ²⁵³Lr · Type: synthetic · Uses: research.
²⁵⁸Db — Unstable · t½ ≈ 4.0 s · Decay: α → ²⁵⁴Lr · Type: synthetic · Uses: research.
²⁵⁹Db — Unstable · t½ ≈ 0.5 s · Decay: α → ²⁵⁵Lr · Type: synthetic · Uses: research.
²⁶⁰Db — Unstable · t½ ≈ 1.5 s · Decay: α → ²⁵⁶Lr · Type: synthetic · Uses: research.
²⁶¹Db — Unstable · t½ ≈ 1.8 s · Decay: α → ²⁵⁷Lr · Type: synthetic · Uses: research.
²⁶²Db — Unstable · t½ ≈ 34.0 s · Decay: α → ²⁵⁸Lr · Type: synthetic · Uses: research.
²⁶³Db — Unstable · t½ ≈ 34.0 s · Decay: α → ²⁵⁹Lr · Type: synthetic · Uses: research.
²⁶⁴Db — Unstable · t½ ≈ 6.0 s · Decay: α → ²⁶⁰Lr · Type: synthetic · Uses: research.
²⁶⁵Db — Unstable · t½ ≈ 16.0 s · Decay: α → ²⁶¹Lr · Type: synthetic · Uses: research.
²⁶⁶Db — Unstable · t½ ≈ 22.0 min · Decay: spontaneous fission, α → ²⁶²Lr · Type: synthetic · Uses: research.
²⁶⁷Db — Unstable · t½ ≈ 73.0 s · Decay: α → ²⁶³Lr · Type: synthetic · Uses: research.
²⁶⁸Db — Unstable · t½ ≈ 29.0 h · Decay: α → ²⁶⁴Lr · Type: synthetic · Uses: relatively long-lived; chemical studies.
²⁶⁹Db — Unstable · t½ ≈ 0.2 s · Decay: α → ²⁶⁵Lr · Type: synthetic · Uses: research.
²⁷⁰Db — Unstable · t½ ≈ 1.0 h · Decay: α → ²⁶⁶Lr · Type: synthetic · Uses: research.
Dubnium — isotope count: 16 total · Stable: none · Unstable: 16.
(Data: IAEA LiveChart, NUBASE2020, ENSDF, Wikipedia “Isotopes of dubnium.” Notable applications: all isotopes produced synthetically, used exclusively in nuclear physics; ²⁶⁸Db notable for relatively long half-life enabling limited chemical studies.)