In reply to Terry Blanton's message of Tue, 3 May 2011 09:30:24 -0400: Hi, [snip] >And dark matter is seasonal: > >http://www.newscientist.com/article/dn20434-second-experiment-hints-at-seasonal-dark-matter-signal.html > >T "DAMA uses an array of sodium iodide detectors to spot the rare moments when WIMPs slam into atoms in the detectors, producing flashes of light. "
..I always wonder how they manage to filter out the effects of natural radioactivity? (which would likely vary from place to place). Not comic rays, but radioactive substances in the earth, e.g. the occasional neutron from natural fission of U235. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
