those not geometrically balanced which would creat a gamma tha would be detected
No... this is a bad assumption, The gammas could be shielded by quantum mechanical processes that are pervasive throughout the entire body of the reactor On Tue, Oct 14, 2014 at 2:53 AM, Alain Sepeda <[email protected]> wrote: > I think we can eliminate 2 kind of impossible reaction : > - those involving free neutrons that would be thermalized even rarely, and > detected > - those not geometrically balanced which would creat a gamma tha would be > detected. > > geometry is the key because of CoM. > probably the electron is too, but that is not sure... > > 2014-10-14 7:22 GMT+02:00 <[email protected]>: > > Hi, >> >> (This email best viewed with a fixed width font). >> >> Prime candidates are even numbered elements with an odd number of >> neutrons. This >> is because subtracting or adding a neutron produces an even-even nucleus, >> and >> these tend to be stable. >> >> The reactions that yield the most energy would use a neutron source where >> the >> neutron is only bound loosely. Here is a table with some isotopes and the >> binding energy of the odd neutron (the lower the binding energy, the >> easier it >> is to remove):- >> >> Isotope Energy (MeV) ppm of the element in the Earth's crust >> D 2.2 ! >> Li7 7.25 13 ! >> Be9 1.573 1.5 >> C13 4.946 200 >> Mg25 7.331 32000 ! >> Si29 8.474 267700 ! >> Ca43 7.933 52900 ! >> Ti47 8.88 5400 ! >> Ti49 8.142 " ! >> Ge73 6.783 1.6 >> Se77 7.419 0.05 >> Sr87 8.428 260 >> Zr91 7.194 100 >> Mo95 7.369 1 >> Mo97 6.821 " >> Pd105 7.094 0.001 >> Cd111 6.976 0.098 >> Sn117 6.943 2.5 >> Sn119 6.483 " >> Ba135 6.973 250 >> Ba137 6.90 " >> >> The most useful isotopes are likely to be those of low atomic number, high >> abundance, and reasonably large isotopic percentage of the element in >> question. >> >> These have been indicated with an "!". >> >> In particular, Mg25 may be an opportunity that has been missed so far. It >> is >> interesting both because of it's abundance, and because of the neutron >> binding >> energy comparable to that of Lithium. >> >> Possible interesting reaction:- >> >> 25Mg + 25Mg => 26Mg + 24Mg + 3.763 MeV >> >> Furthermore the energy is divided over two nuclei of almost equal mass, >> hence >> each gets about half (1.9 MeV), so this could be a very clean reaction. >> >> >> Regards, >> >> Robin van Spaandonk >> >> http://rvanspaa.freehostia.com/project.html >> >> >
