Pb-210 + Ra-226

Plumbum-210 + Radium-226

Natural

α, β, γ radiation

Half-life: 22.3 years

Main emission lines: 47 keV

Decay chain: Ra-226

Related lines: 78, 186, 242, 295, 351, 609, 1120, 1760, 2200 keV

Advanced data

Decay mode Alpha

Alpha

Energy, keV	Intensity, %
3720	0.0000019

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Decay mode Beta-

Beta-

Energy, keV	Intensity, %	Decay En., %
4.16	84	(17.0)
16.16	16	(63.5)

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Gamma

Energy, keV	Intensity, %
46.539	4.25

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X-rays

Energy, keV	Intensity, %
9.419 - 16.389	22.7

This isotope is almost always present in a mixture with other isotopes characteristic of the decay chain of uranium, radium, or radon. It can be found separately in objects that have been exposed to incredibly high levels of radon for a long time, for example, on the internal parts of watches where paint based on Radium-226 was used.

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