On Sat, 29 Dec 2007 17:34:10 -0800, you wrote: >But there is one element I found that is even better than iron; >it's rare, but its neutron cross section is 48,800 barns (!) which >more than makes up for its rarity relative to iron. It's gadolinium >(Gd). It's about 9000 times rarer than iron, but its huge neutron >affinity more than makes up for it. For a given kilo of earth, >gadolinium ends up being a little more than twice as good as iron >as a neutron getter.
... > >I still have a big problem coming up with the mechanism by which >E.P.'s large impact is supposed to generate these neutrons. Since >the temperature is too low to achieve a nuclear reaction thermally, >and the impact velocity is far too low to do it kinetically, the >only thing left I can think of is some sort of fusor-like plasma >reaction -- alas, without the benefit of deuterium. --Rob To sum it up, you don't know how the neutrons would hit the broad side of a gd barn? ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
