That's an alpha source, not much good for most detectors. Not sure if anyone sells thoriated lantern mantles anymore. My main test source is a chunk of pitchblende (naturally occurring and not subject to licensing) that registers about 30,000 cpm.<br>
<div class="gmail_quote"><div><br>Nope.. Now that they have a non-radioactive version they all proudly announce that they are non-radioactive.<br><br>When they were radioactive, all they said was not to breathe the dust. <br>
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