¹²⁸Sm — Unstable · t½ ≈ 10 ms · Decay: β⁺ → ¹²⁸Pm · Type: synthetic · Uses: research.
¹²⁹Sm — Unstable · t½ ≈ 50 ms · Decay: β⁺ → ¹²⁹Pm · Type: synthetic · Uses: research.
¹³⁰Sm — Unstable · t½ ≈ 1.5 min · Decay: β⁺ → ¹³⁰Pm · Type: synthetic · Uses: research.
¹³¹Sm — Unstable · t½ ≈ 1.0 min · Decay: β⁺ → ¹³¹Pm · Type: synthetic · Uses: research.
¹³²Sm — Unstable · t½ ≈ 2.0 min · Decay: β⁺ → ¹³²Pm · Type: synthetic · Uses: research.
¹³³Sm — Unstable · t½ ≈ 1.5 min · Decay: β⁺ → ¹³³Pm · Type: synthetic · Uses: research.
¹³⁴Sm — Unstable · t½ ≈ 10.0 min · Decay: β⁺ → ¹³⁴Pm · Type: synthetic · Uses: research.
¹³⁵Sm — Unstable · t½ ≈ 9.9 min · Decay: β⁺ → ¹³⁵Pm · Type: synthetic · Uses: research.
¹³⁶Sm — Unstable · t½ ≈ 1.5×10¹¹ y · Decay: α → ¹³²Nd · Type: primordial radionuclide · Uses: geochronology, nuclear studies.
¹³⁷Sm — Unstable · t½ ≈ 1.5 h · Decay: β⁻ → ¹³⁷Eu · Type: synthetic · Uses: research.
¹³⁸Sm — Unstable · t½ ≈ 2.5×10¹⁵ y · Decay: α → ¹³⁴Nd · Type: primordial radionuclide · Uses: geochronology, nuclear physics.
¹³⁹Sm — Unstable · t½ ≈ 2.7 d · Decay: β⁻ → ¹³⁹Eu · Type: activation product · Uses: tracer.
¹⁴⁰Sm — Unstable · t½ ≈ 14.8 min · Decay: β⁻ → ¹⁴⁰Eu · Type: synthetic · Uses: research.
¹⁴¹Sm — Unstable · t½ ≈ 10.0 min · Decay: β⁻ → ¹⁴¹Eu · Type: synthetic · Uses: research.
¹⁴²Sm — Stable · — · Type: stable (primordial) · Uses: isotopic tracer.
¹⁴³Sm — Unstable · t½ ≈ 8.75 y · Decay: β⁻ → ¹⁴³Eu · Type: activation product · Uses: tracer.
¹⁴⁴Sm — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁴⁵Sm — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁴⁶Sm — Unstable · t½ ≈ 1.03×10⁸ y · Decay: α → ¹⁴²Nd · Type: extinct radionuclide (cosmochemistry) · Uses: solar system dating.
¹⁴⁷Sm — Unstable · t½ ≈ 1.06×10¹¹ y · Decay: α → ¹⁴³Nd · Type: primordial radionuclide · Uses: Sm–Nd dating system in geology.
¹⁴⁸Sm — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁴⁹Sm — Unstable · t½ ≈ 7.0×10¹⁵ y · Decay: α → ¹⁴⁵Nd · Type: primordial radionuclide · Uses: reactor physics (neutron capture).
¹⁵⁰Sm — Stable · — · Type: stable (primordial) · Uses: isotope tracer, nuclear research.
¹⁵¹Sm — Unstable · t½ ≈ 90 y · Decay: β⁻ → ¹⁵¹Eu · Type: activation product · Uses: tracer, reactor physics.
¹⁵²Sm — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁵³Sm — Unstable · t½ ≈ 46.3 h · Decay: β⁻ → ¹⁵³Eu · Type: medical isotope · Uses: radiotherapy for bone pain treatment.
¹⁵⁴Sm — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹⁵⁵Sm — Unstable · t½ ≈ 22.3 min · Decay: β⁻ → ¹⁵⁵Eu · Type: synthetic · Uses: research.
¹⁵⁶Sm — Unstable · t½ ≈ 9.4 h · Decay: β⁻ → ¹⁵⁶Eu · Type: synthetic · Uses: research.
¹⁵⁷Sm — Unstable · t½ ≈ 8.4 min · Decay: β⁻ → ¹⁵⁷Eu · Type: synthetic · Uses: research.
¹⁵⁸Sm — Unstable · t½ ≈ 6.0 min · Decay: β⁻ → ¹⁵⁸Eu · Type: synthetic · Uses: research.
¹⁵⁹Sm — Unstable · t½ ≈ 3.0 min · Decay: β⁻ → ¹⁵⁹Eu · Type: synthetic · Uses: research.
¹⁶⁰Sm — Unstable · t½ ≈ 1.5 min · Decay: β⁻ → ¹⁶⁰Eu · Type: synthetic · Uses: research.
¹⁶¹Sm — Unstable · t½ ≈ 1.0 min · Decay: β⁻ → ¹⁶¹Eu · Type: synthetic · Uses: research.
¹⁶²Sm — Unstable · t½ ≈ 55 s · Decay: β⁻ → ¹⁶²Eu · Type: synthetic · Uses: research.
¹⁶³Sm — Unstable · t½ ≈ 25 s · Decay: β⁻ → ¹⁶³Eu · Type: synthetic · Uses: research.
¹⁶⁴Sm — Unstable · t½ ≈ 10 s · Decay: β⁻ → ¹⁶⁴Eu · Type: synthetic · Uses: research.
¹⁶⁵Sm — Unstable · t½ ≈ 5 s · Decay: β⁻ → ¹⁶⁵Eu · Type: synthetic · Uses: research.
¹⁶⁶Sm — Unstable · t½ ≈ 3 s · Decay: β⁻ → ¹⁶⁶Eu · Type: synthetic · Uses: research.
Samarium — isotope count: 39 total · Stable: 7 (¹⁴²Sm, ¹⁴⁴Sm, ¹⁴⁵Sm, ¹⁴⁸Sm, ¹⁵⁰Sm, ¹⁵²Sm, ¹⁵⁴Sm) · Unstable: 32.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: ¹⁴⁷Sm–¹⁴³Nd dating in geology, ¹³⁶Sm & ¹³⁸Sm in geochronology, ¹⁵³Sm in radiotherapy, Sm isotopes in nuclear research and tracers.)
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