http://tech.groups.yahoo.com/group/particledetector/ Counting Cosmic Particles from Space Fri, 06 Nov 2009 15:59:10 GMT Robert http://tech.groups.yahoo.com/group/particledetector/message/689 http://tech.groups.yahoo.com/group/particledetector/message/689 Nice to see the list is back. I've been making a few variation of Geiger Muller array detector here is one http://www.hardhack.org.au/geiger_muller_detector Fri, 06 Nov 2009 15:59:06 GMT DanielS http://tech.groups.yahoo.com/group/particledetector/message/688 http://tech.groups.yahoo.com/group/particledetector/message/688 Breeder reactors do not create matter from nothing and do not violate any conservation laws. They merely transmute the non-fissionable uranium-238 isotope, Tue, 27 Oct 2009 19:16:59 GMT al_birdie_2000 http://tech.groups.yahoo.com/group/particledetector/message/687 http://tech.groups.yahoo.com/group/particledetector/message/687 Hi all, first of all, I'm very sorry about the long absence! There were some complicated issues I had to deal with. But now things are getting better. When I Tue, 27 Oct 2009 18:52:57 GMT boxa588 http://tech.groups.yahoo.com/group/particledetector/message/686 http://tech.groups.yahoo.com/group/particledetector/message/686 the first nuclear reactor was not the same as what they are using today. no, this reactor was called a breed reactor. it was such an important discovery in Tue, 27 Oct 2009 18:52:10 GMT robertatairstream http://tech.groups.yahoo.com/group/particledetector/message/685 http://tech.groups.yahoo.com/group/particledetector/message/685 Progress is continuing, all be it slowly, as I have been experiencing issues with stability using fluorescent tubes. There are many variable between different Tue, 27 Oct 2009 18:51:39 GMT robertatairstream http://tech.groups.yahoo.com/group/particledetector/message/684 http://tech.groups.yahoo.com/group/particledetector/message/684 I've just bought 10x very cheap Geiger tubes from Russia (all tested ok) and was going to construct a muon detector in a similar configuration to my planned Fri, 06 Mar 2009 02:34:11 GMT Rodney Howe http://tech.groups.yahoo.com/group/particledetector/message/683 http://tech.groups.yahoo.com/group/particledetector/message/683 I've posted a few new files in the Rodney_Howe folder: 090222 and 090220 where there seems to be an increase in the average muon count during the early morning Thu, 05 Mar 2009 13:40:40 GMT Ronald Fleshman http://tech.groups.yahoo.com/group/particledetector/message/682 http://tech.groups.yahoo.com/group/particledetector/message/682 Robert, Americanium 241 is a strong alpha emitter and a weak gamma emitter. The glass in your tubes will block the alphas.  Most Geiger counters have tube Thu, 05 Mar 2009 11:10:40 GMT robertatairstream http://tech.groups.yahoo.com/group/particledetector/message/681 http://tech.groups.yahoo.com/group/particledetector/message/681 That is excellent feedback Hannes, as I was very disappointed that I didn't get the same level reaction in the tube detector as I did with a Geiger counter. As Thu, 05 Mar 2009 09:05:31 GMT Ing. Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/680 http://tech.groups.yahoo.com/group/particledetector/message/680 G'day Robert, ... this sounds a little strange to me, since alphas won't go thru the glass of the tube. Most likely your source also produces a good amount of Thu, 05 Mar 2009 06:50:21 GMT robertatairstream http://tech.groups.yahoo.com/group/particledetector/message/679 http://tech.groups.yahoo.com/group/particledetector/message/679 I went out on the weekend and bought a smoke detector for only $7AU which has a nice little alloy disk with americium 241 (according the package). It seems to Mon, 02 Mar 2009 21:18:28 GMT michael dowling http://tech.groups.yahoo.com/group/particledetector/message/678 http://tech.groups.yahoo.com/group/particledetector/message/678 The answer is yes. I arranged a visit for my college physics group. However we had to cancel due to unforseen circumstances. Educational visits are allowed Sat, 28 Feb 2009 21:06:49 GMT jacklusk3 http://tech.groups.yahoo.com/group/particledetector/message/677 http://tech.groups.yahoo.com/group/particledetector/message/677 Yes, all posts arrive by email. Jack3 Sat, 28 Feb 2009 08:24:50 GMT Marco IK1ODO -2 http://tech.groups.yahoo.com/group/particledetector/message/676 http://tech.groups.yahoo.com/group/particledetector/message/676 ... Loud and clear, Hannes. Marco Sat, 28 Feb 2009 07:16:34 GMT fanman http://tech.groups.yahoo.com/group/particledetector/message/675 http://tech.groups.yahoo.com/group/particledetector/message/675 Seems fine for me. Clay ... From: particledetector@yahoogroups.com [mailto:particledetector@yahoogroups.com] On Behalf Of Ing. Hannes Mayer Sent: Saturday,