Date: Sat, 15 Feb 2003 01:48:01 -0800 From: Kent Stewart <kstewart@owt.com> To: Pete French <pfrench@firstcallgroup.co.uk>, dillon@apollo.backplane.com, kudzu@tenebras.com Cc: des@ofug.org, doconnor@gsoft.com.au, emechler@techometer.net, freebsd-stable@FreeBSD.ORG, wkb@freebie.xs4all.nl Subject: Re: ECC memory error reporting Message-ID: <200302150148.01126.kstewart@owt.com> In-Reply-To: <E18jycs-000Hy9-00@mailhost.firstcallgroup.co.uk> References: <E18jycs-000Hy9-00@mailhost.firstcallgroup.co.uk>
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On Saturday 15 February 2003 01:28 am, Pete French wrote: > > You are forgetting about all of the wristwatches that glowed in the > > dark. They are probably much more common in the antique shops. Or > > the pretty yellow painted dished that were painted with a U based > > paint. > > Bringing things more up to date - what about those Tritium keyrings > that were all the rage at christmas ? I;ve got about ten of them in > the spare room and it might be interesting to do some memory > experiments with them, assuming they are sufficiently radioactive. Tritium has a 12.5 year half life and gives off a low energy beta particle and no gamma. IIRC, a sheet of paper is supposed to stop betas. Radium, which was used in the early glow-in-the-dark watches, mostly gives off energetic alphas and gammas. Some isotopes of radium have half lives in seconds and some in K years. The daughter products aren't any nicer. When it comes to being nasty, Tritium isn't even on the same planet. Kent -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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