Andrew Lathrop says:
I created this inexpensive radiation dosimeter for the people of Japan. Strange that when I sent this to Japanese newspapers it was not printed or commented on.
We were all amazed at the sensitivity of an inexpensive digital camera ccd to beta radiation eqvalent to 100 bananas (+- 1.0 mrem).
I have run the experiment Pyrex dishware with 14 bananas as a source using 10 exposures resulting in 4.7 sigma events. A single photo yielded only a 1.5 sigma not signifacant to write about. I still have a few more experiments to do.