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Disclaimer: This software is for radiation protection education, screening calculations, and professional support only. It does not replace qualified health physicist judgment, regulatory requirements, approved procedures, emergency response tools, or formal shielding design review. Exposure, absorbed dose, equivalent dose, and effective dose are distinct quantities; do not equate R and Sv without explicit context and assumptions.

Decay calculator

Select a nuclide to load tabulated half-life. Adjust activity and elapsed time; results update live.

Nuclide

Selected: Co-60

Co-60γ · β

Teletherapy

Catalog id: co-60

Half-life (bundled row)
5.27 y
Decay modes
β⁻, γ
Photon energies (keV)
1173, 1332
Gamma constant (µSv·m²/MBq·h)
0.35
Gamma constant confidence / provenance
IllustrativeScreening air-kerma-rate style constant (µSv·m²/MBq·h) bundled for training; verify against your approved reference table or measurement certificate.
MBq
h
h

Curve samples from zero up to this elapsed time.

Results

99.9640 MBq

Percent remaining
99.96%
Half-lives elapsed
0.001
Decay constant (1/s)
4.167838e-9

A(t) = A0 * exp(-lambda * t), lambda = ln(2)/halfLife

Single nuclide exponential decay; half-life treated as exact for the selected nuclide row.

Decay curve (h vs MBq)

No chart data for current inputs.