by Doug Coulter » Mon May 23, 2011 7:24 pm
Yes, it's the T, no question whatsoever in my mind. While a single pulse from a degraded-energy beta from a T changed into a gamma with attendant further energy loss is below the threshold shown here -- the fact that pileups pushed the usual thresholded-out noise up above threshold on double hits ( and quite a large number of them, evidently) says to me, unequivocally, that yes, outside the glass, T makes a measurable amount of (gamma for sure) radiation, easily (well,,,,I have some great gear here too) detectable.
So much for "you can't do that". Hah. You just did. I check that.
It'd be a lot better and more obvious on an HPGE with cryo, which I don't have and am having trouble craving the rent on but...no question at least as far as I'm concerned, I just checked it myself with stuff I have a lotta reasons to trust. It's way outa background here too -- never thought to check before.
Were I a little more ambitious (maybe this week, more likely next, I have this other telescopic job to do first) I'd put this up on a super good low energy resolver head (have one) and really prove it with an internal spectrum of the various energy "landings" on the decay of T into -- all this stuff. But that insanely higher peak says it all - it's there.
Posting as just me, not as the forum owner. Everything I say is "in my opinion" and YMMV -- which should go for everyone without saying.