From: Eric Walker
"it is true that the neutron-capture cross section goes way
down when the
neutrons are very slow."
Good catch -- a typo. I meant to say that the cross section
increases, i.e., neutron capture becomes more likely. I've been flipping
concepts lately.You got it right the first time – at least with regard to many elements and especially the most important one. The study of neutrons at cryogenic temperature is well-known. And in fact nickel, in particular, is known to reflect cold neutrons, when it would otherwise absorb them if they were warmer. Are ULM neutrons somehow warm? LOL. In fact, nickel is often used in experimental cryogenic neutron devices because it does not absorb ultracold neutrons. See the table here: http://en.wikipedia.org/wiki/Ultracold_neutrons If you want to defend W-L, which is impossible, start by trying to imagine how “ultra low momentum” differs from “ultra cold” and then ask yourself how the authors and supporters of such a brain-dead theory can continue to overlook the 800 pound gorilla in the closet?
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