I stand corrected. It appears that 214Bi and 214Pb are gamma emitters in the radon daughter chain. Most of the signatures are between 100keV and 1MeV with a few above.
On Sat, Mar 5, 2016 at 9:29 AM, Jones Beene <jone...@pacbell.net> wrote: > Bob, > > > > All three radon isotopes have gamma decay channels in addition to alpha. > The signatures are well known (around 6 MeV). > > > > Radon detection is a cottage industry in silicon valley > > > > > > *From:* Bob Higgins > > > > Jeff's setup may be more sensitive to radon than Alan's. The NaI detector > that Alan used is only sensitive to gamma, and not beta. Radon decay > chains are primarily alpha and beta emissions. With the foil wrapped > around Jeff's GM detector, he probably does not have much alpha > sensitivity, but he will still have beta sensitivity - which could come > from radon. Beta and alpha sensitivity can be evaluated with check > sources. If Jeff is in the same area as Alan, he could borrow Alan's check > sources, but I am not sure if Alan has a beta source. A good 24 hour > background collection would also be useful as a null test to look for radon > caused variation. > > > > On Sat, Mar 5, 2016 at 8:35 AM, Jones Beene <jone...@pacbell.net> wrote: > > *From:* Jack Cole > > > > Ø Jeff Morriss has just published a nice study showing radiation of > 7x background. > > > https://www.lenr-forum.com/forum/index.php/Thread/2847-Celani-Type-Replication/ > > This is nice. Here is one comment to file away as a possible mundane > explanation. > > Jeff Morriss is in the same general geographic area as Alan Goldwater, > and is probably working in his garage. Radon gas is known to be high in > Alan’s area, and probably in Jeff’s also -- and 7x background is fully > explainable by radon, if it is there… as is the apparent half-life average. > > … but wait, you say, Jeff did calibrate against background before seeing > the higher rate, and also the half-life of 222Rn is about 4 days, not one > hour. > > Yes, but this calibration would not eliminate the source being Radon, > since he is running a charged wire experiment - and when the experiment is > turned on, it would attract radon to the wire and thus concentrate the > signal. Plus a factor of 7 concentration is not unusual; plus the average > of all three radon isotopes can be in the one hour half-life range. > > Therefore – the source of radiation could be radon. At least it has not > yet been ruled out. > > One way to lessen radon is to move the experiment outside, or to an area > of lower radon emission (assuming it is high at Jeff’s location). > > >
