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Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials were produced throughout most of the 20th century before being replaced by safer tritium-based luminous material in the 1970s and finally by non-toxic, non-radioactive strontium aluminate–based photoluminescent material from the middle 1990s.

Due to the use of 226Ra only, without adding any other radioisotope, this spectrum is (almost) completely identical to the other 226Ra measurement in this database.

Spectrum (Fullscreen)

5 minute measurement with a High Purity Germanium (HPGe) radiation detector.


Mass number:
Atomic number:
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Sources and Further Read