Sr 90 Spinthariscope

A Strontium-90 Spinthariscope made from a cheap 640 by 480 webcam picked up from Fry's Electronics for $9.99. Cheapest one that I have gotten to work yet.
Strontium-90 undergoes beta decay with a half-life of 28.79 years.

[@vegadva5744]

Rad. Found some ZnS(Ag) sheets on ebay, Time to whip up my own. Clever use of webcam