Hi A lot of Radon and *really* poor ventilation….
There are a lot of ways for He to show up. In normal use, issue is hanging on to it. It tends to run away from its source very quickly. Maintaining a measurable concentration in something like a normal room …. not very easy at all. Bob > On Nov 1, 2018, at 3:04 AM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > > -------- > In message <b584a9e5-c2ac-7951-f499-3601c2e25...@karlquist.com>, "Richard > (Rick > ) Karlquist" writes: > >> According to Jack, radon emits alpha particles, AKA helium nuclei. >> These capture stray electrons and become helium atoms. So the >> presence of helium is a marker for radon. The fact that the half >> life is a few days supports this hypothesis. At least that is what >> Jack told me. > > Right, but you need a LOT of Radon before the Helium concentration > becomes a problem, and the alphas would literally make things > glow in the dark. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
