Cesium-137 Half-Life Calculator | Nuclear Decay Calculator

Calculate the decay rate and remaining quantity of Cesium-137 (¹³⁷Cs). Half-life of 30.17 years. Free online calculator for nuclear decay calculations.

Cesium-137 (¹³⁷Cs)

Half-Life: 30.17 years

Initial Quantity (N₀)

Half-Life (t₁/₂)

Time (t)

About Cesium-137

Common radioisotope used in industrial applications and medical devices.

Applications

Industrial gauging
Flow measurement
Radiation therapy
Calibration sources

Decay Constants

λ = 0.022975

Decay constant in units of years⁻¹

τ = 43.526109

Mean lifetime in years

Decay Formula

N(t) = N₀ × (1/2)^(t/30.17)

Where:
N(t) = Quantity remaining at time t
N₀ = Initial quantity
t = Time in years

Related Elements

Carbon-14 Uranium-238 Iodine-131

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