[ExI] Neutrino interaction web
anders at aleph.se
Thu Mar 3 23:13:16 UTC 2011
One of the classic simple models of atomic nuclei is the "droplet model"
by Gamow, Bohr and Wheeler, which just treats them as liquid droplets of
incompressible fluid with a heck of a surface tension. Insofar this
model works, it suggests that nuclear matter in its normal state is a
pretty lousy building material unless you like lumps of stuff.
However, Adrian, I am curious of why you thought a sheet of neutrons
would stop neutrinos?
Personally I doubt it would work: any interaction would be by the weak
force, and it is pretty wimpy. Lacking some lepton with the right charge
the neutrino could not be absorbed by a reaction like n0 + v + e+ -> p+,
so there might not even be any allowed reaction. But weird things happen
when you spread out matter in low dimensional structures (think of
graphenes), so intuitions might be misleading.
Future of Humanity Institute
Philosophy Faculty of Oxford University
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