[NewCandle] further adventures of pixie 23

[Jones Beene]

K. 

> Not sure why radon is suspected, other than that it is a gamma
emitter.

Radon is the most radioactive (short half-life) gas of the "daughters" in
the U decay chain, and most importantly for (possibly) explaining Nick's
results, it is the only gas. 

http://en.wikipedia.org/wiki/Radon

Specifically, it comes from the alpha decay of radium, which comes from the
alpha decay of U. 

Jones