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PraedSt
2011-Nov-29, 11:40 AM
http://arxiv.org/abs/1111.6099 is a readable paper about looking at neutrinos coming from radioactive decay inside the Earth, as a way to determine how much of the energy (47 TeraWatts) coming out of the Earth as heat flow is being generated by this decay. This paper is only about the prospects we have for making such measurements, but it is very cool to think that this is within our grasp.Hope a quick question is ok. How are geo-neutrinos distinguished from solar neutrinos? Do they have different energy levels?

antoniseb
2011-Nov-29, 11:52 AM
Hope a quick question is ok. How are geo-neutrinos distinguished from solar neutrinos? Do they have different energy levels?

There are three factors, one is energy levels, since geoneutrinos are coming from Uranium, Thorium, and Potassium decay (chiefly among others), and these neutrinos have different energy than the fusion neutrinos we get from the Sun. They are also anti-neutrinos. Perhaps most interestingly, if their sources aren't uniformly distributed in the Earth, we will get different intensities at different locations, giving us some ability to map the distribution of radionucleides in the Earth.

PraedSt
2011-Nov-29, 12:03 PM
Ok thanks. That was a good paper (I added it in a geology thread), but that particular section was a bit heavy going!