²¹⁴U — Unstable · t½ ≈ 0.52 ms · Decay: α → ²¹⁰Th · Type: synthetic · Uses: research. Wikipedia
²¹⁵U — Unstable · t½ ≈ 1.4 ms · Decay: α → ²¹¹Th · Type: synthetic · Uses: research. Wikipedia
²¹⁶U — Unstable · t½ ≈ 2.25 ms · Decay: α → ²¹²Th · Type: synthetic · Uses: research. Wikipedia
²¹⁷U — Unstable · t½ ≈ 19.3 ms · Decay: α → ²¹³Th · Type: synthetic · Uses: research. Wikipedia
²¹⁸U — Unstable · t½ ≈ 650 μs · Decay: α → ²¹⁴Th · Type: synthetic · Uses: research. Wikipedia
²¹⁹U — Unstable · t½ ≈ 60 μs · Decay: α → ²¹⁵Th · Type: synthetic · Uses: research. Wikipedia
²²¹U — Unstable · t½ ≈ 0.66 μs · Decay: α → ²¹⁷Th · Type: synthetic · Uses: research. Wikipedia
²²²U — Unstable · t½ ≈ 4.7 μs · Decay: α → ²¹⁸Th · Type: synthetic · Uses: research. Wikipedia
²²³U — Unstable · t½ ≈ 65 μs · Decay: α → ²¹⁹Th · Type: synthetic · Uses: research. Wikipedia
²²⁴U — Unstable · t½ ≈ 396 μs · Decay: α → ²²⁰Th · Type: synthetic · Uses: research. Wikipedia
²²⁵U — Unstable · t½ ≈ 62 ms · Decay: α → ²²¹Th · Type: synthetic · Uses: research. Wikipedia
²²⁶U — Unstable · t½ ≈ 269 ms · Decay: α → ²²²Th · Type: synthetic · Uses: research. Wikipedia
²²⁷U — Unstable · t½ ≈ 1.1 min · Decay: α → ²²³Th · Type: synthetic · Uses: research. Wikipedia
²²⁸U — Unstable · t½ ≈ 9.1 min · Decay: α (97.5%) → ²²⁴Th; EC (2.5%) → ²²⁸Pa · Type: synthetic · Uses: research. Wikipedia
²²⁹U — Unstable · t½ ≈ 57.8 min · Decay: β⁺ (80%) → ²²⁹Pa; α (20%) → ²²⁵Th · Type: synthetic · Uses: research. Wikipedia
²³⁰U — Unstable · t½ ≈ 20.23 d · Decay: α → ²²⁶Th · Type: synthetic · Uses: tracer/research. Wikipedia
²³¹U — Unstable · t½ ≈ 4.2 d · Decay: EC → ²³¹Pa (minor α branch) · Type: synthetic · Uses: research. Wikipedia
²³²U — Unstable · t½ ≈ 68.9 y · Decay: α → ²²⁸Th · Type: fuel-cycle by-product (²³³U production) · Uses: calibration/monitoring, research. Wikipedia
²³³U — Unstable · t½ ≈ 1.592×10⁵ y · Decay: α → ²²⁹Th · Type: fissile (from ²³²Th) · Uses: thorium fuel cycle. Wikipedia
²³⁴U — Unstable · t½ ≈ 2.455×10⁵ y · Decay: α → ²³⁰Th · Type: radiogenic in natural U · Uses: U–Th/ U–Pb dating, environmental tracer. Wikipedia
²³⁵U — Unstable · t½ ≈ 7.04×10⁸ y · Decay: α → ²³¹Th · Type: fissile, primordial · Uses: reactor fuel, weapons. Wikipedia
²³⁶U — Unstable · t½ ≈ 2.342×10⁷ y · Decay: α → ²³²Th · Type: reactor-produced · Uses: spent-fuel tracer. Wikipedia
²³⁷U — Unstable · t½ ≈ 6.752 d · Decay: β⁻ → ²³⁷Np · Type: activation product · Uses: research. Wikipedia
²³⁸U — Unstable · t½ ≈ 4.463×10⁹ y · Decay: α → ²³⁴Th · Type: fertile, primordial · Uses: U–Pb dating, breeding to ²³⁹Pu. Wikipedia
²³⁹U — Unstable · t½ ≈ 23.45 min · Decay: β⁻ → ²³⁹Np · Type: reactor intermediate · Uses: step in Pu-239 production. Wikipedia
²⁴⁰U — Unstable · t½ ≈ 14.1 h · Decay: β⁻ → ²⁴⁰ᵐNp · Type: reactor product · Uses: research. Wikipedia
²⁴¹U — Unstable · t½ ≈ ~40 min (reported 2023) · Decay: β⁻ → ²⁴¹Np · Type: synthetic · Uses: research. Wikipedia
²⁴²U — Unstable · t½ ≈ 16.8 min · Decay: β⁻ → ²⁴²Np · Type: synthetic · Uses: research. Wikipedia
Uranium — isotope count: 28 total (²¹⁴–²⁴², excluding ²²⁰) · Stable: none · Primordial: ²³⁵U, ²³⁸U (with radiogenic ²³⁴U present in natural U). (Data and half-lives: IAEA LiveChart/ENSDF and NUBASE2020; consolidated table and recent ²⁴¹U report via Wikipedia’s “Isotopes of uranium”.) IAEAwww-nds.iaea.orgWikipedia
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