¹¹⁴Ba — Unstable · t½ ≈ 0.5 s · Decay: β⁺ → ¹¹⁴Cs · Type: synthetic · Uses: research.
¹¹⁵Ba — Unstable · t½ ≈ 0.45 s · Decay: β⁺ → ¹¹⁵Cs · Type: synthetic · Uses: research.
¹¹⁶Ba — Unstable · t½ ≈ 0.6 s · Decay: β⁺ → ¹¹⁶Cs · Type: synthetic · Uses: research.
¹¹⁷Ba — Unstable · t½ ≈ 0.8 s · Decay: β⁺ → ¹¹⁷Cs · Type: synthetic · Uses: research.
¹¹⁸Ba — Unstable · t½ ≈ 5.0 min · Decay: β⁺ → ¹¹⁸Cs · Type: synthetic · Uses: research.
¹¹⁹Ba — Unstable · t½ ≈ 5.0 min · Decay: β⁺ → ¹¹⁹Cs · Type: synthetic · Uses: research.
¹²⁰Ba — Unstable · t½ ≈ 24.1 min · Decay: β⁺ → ¹²⁰Cs · Type: synthetic · Uses: research.
¹²¹Ba — Unstable · t½ ≈ 29.7 min · Decay: β⁺ → ¹²¹Cs · Type: synthetic · Uses: research.
¹²²Ba — Unstable · t½ ≈ 2.6 min · Decay: β⁺ → ¹²²Cs · Type: synthetic · Uses: research.
¹²³Ba — Unstable · t½ ≈ 11.5 min · Decay: β⁺ → ¹²³Cs · Type: synthetic · Uses: research.
¹²⁴Ba — Unstable · t½ ≈ 11.5 min · Decay: β⁺ → ¹²⁴Cs · Type: synthetic · Uses: research.
¹²⁵Ba — Unstable · t½ ≈ 3.5 min · Decay: β⁺ → ¹²⁵Cs · Type: synthetic · Uses: research.
¹²⁶Ba — Unstable · t½ ≈ 100 min · Decay: β⁺ → ¹²⁶Cs · Type: synthetic · Uses: research.
¹²⁷Ba — Unstable · t½ ≈ 12.7 min · Decay: β⁺ → ¹²⁷Cs · Type: synthetic · Uses: research.
¹²⁸Ba — Unstable · t½ ≈ 2.43 d · Decay: β⁺ → ¹²⁸Cs · Type: synthetic · Uses: tracer.
¹²⁹Ba — Unstable · t½ ≈ 2.23 h · Decay: β⁺ → ¹²⁹Cs · Type: synthetic · Uses: research.
¹³⁰Ba — Stable · — · Type: stable (primordial) · Uses: isotopic tracer.
¹³¹Ba — Unstable · t½ ≈ 11.5 d · Decay: β⁻ → ¹³¹La · Type: fission product · Uses: tracer.
¹³²Ba — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹³³Ba — Unstable · t½ ≈ 10.5 y · Decay: β⁻ → ¹³³La · Type: activation product · Uses: calibration source in nuclear medicine.
¹³⁴Ba — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹³⁵Ba — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹³⁶Ba — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹³⁷Ba — Stable · — · Type: stable (primordial) · Uses: isotope tracer.
¹³⁸Ba — Stable · — · Type: stable (primordial, most abundant) · Uses: isotope tracer.
¹³⁹Ba — Unstable · t½ ≈ 83.1 min · Decay: β⁻ → ¹³⁹La · Type: synthetic · Uses: research.
¹⁴⁰Ba — Unstable · t½ ≈ 12.8 d · Decay: β⁻ → ¹⁴⁰La · Type: fission product · Uses: reactor monitoring.
¹⁴¹Ba — Unstable · t½ ≈ 18.3 min · Decay: β⁻ → ¹⁴¹La · Type: fission product · Uses: reactor monitoring.
¹⁴²Ba — Unstable · t½ ≈ 10.6 min · Decay: β⁻ → ¹⁴²La · Type: fission product · Uses: reactor monitoring.
¹⁴³Ba — Unstable · t½ ≈ 14.5 s · Decay: β⁻ → ¹⁴³La · Type: synthetic · Uses: research.
¹⁴⁴Ba — Unstable · t½ ≈ 11.5 s · Decay: β⁻ → ¹⁴⁴La · Type: synthetic · Uses: research.
¹⁴⁵Ba — Unstable · t½ ≈ 4.1 s · Decay: β⁻ → ¹⁴⁵La · Type: synthetic · Uses: research.
¹⁴⁶Ba — Unstable · t½ ≈ 2.2 s · Decay: β⁻ → ¹⁴⁶La · Type: synthetic · Uses: research.
¹⁴⁷Ba — Unstable · t½ ≈ 1.0 s · Decay: β⁻ → ¹⁴⁷La · Type: synthetic · Uses: research.
¹⁴⁸Ba — Unstable · t½ ≈ 0.65 s · Decay: β⁻ → ¹⁴⁸La · Type: synthetic · Uses: research.
¹⁴⁹Ba — Unstable · t½ ≈ 0.35 s · Decay: β⁻ → ¹⁴⁹La · Type: synthetic · Uses: research.
¹⁵⁰Ba — Unstable · t½ ≈ 0.25 s · Decay: β⁻ → ¹⁵⁰La · Type: synthetic · Uses: research.
¹⁵¹Ba — Unstable · t½ ≈ 0.2 s · Decay: β⁻ → ¹⁵¹La · Type: synthetic · Uses: research.
¹⁵²Ba — Unstable · t½ ≈ 0.15 s · Decay: β⁻ → ¹⁵²La · Type: synthetic · Uses: research.
¹⁵³Ba — Unstable · t½ ≈ 0.1 s · Decay: β⁻ → ¹⁵³La · Type: synthetic · Uses: research.
Barium — isotope count: 40 total · Stable: 7 (¹³⁰Ba, ¹³²Ba, ¹³⁴Ba, ¹³⁵Ba, ¹³⁶Ba, ¹³⁷Ba, ¹³⁸Ba) · Unstable: 33.
(Data: IAEA LiveChart, NUBASE2020, ENSDF; notable applications: ¹³³Ba as calibration source, ¹⁴⁰Ba in reactor monitoring, stable Ba isotopes in geochemistry and tracer studies.)
Key terms in plain language
Open a term for a concise explanation of language used on this page.
Broadband
A general term for always-on, high-speed Internet access. Broadband can be delivered over fiber, cable, DSL, fixed wireless, cellular, or satellite networks.
Cloud Computing
Computing resources—such as applications, servers, storage, or databases—delivered from remote infrastructure and scaled as requirements change.
Cybersecurity
The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.
Identity and Access Management (IAM)
The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.
API
An application programming interface is a defined way for software systems to exchange data or request functions from one another.
Artificial Intelligence (AI)
Software designed to perform tasks involving prediction, classification, generation, reasoning, or decision support. Business use still requires clear data, governance, security, and human accountability.