On Sun, Mar 22, 2015 at 9:53 AM, Bob Cook <[email protected]> wrote:
In general in commercial NMR the energies are small, one spin quanta for > example. However, there is no reason why higher spin quanta cannot be > involved ... Note that for nuclear magnetic resonance to occur, you need non-spin-0 nuclei with nonzero magnetic moments. There are nuclear isomers and excited bound states with energies in the keV to MeV above the ground state. If there is something nuclear going on, nuclear spin will no doubt be involved in the final account, if only because nuclear transitions have an initial and a final spin state. An attraction to focusing on nuclear spin is the possibility of fractionation of the energy of a large nuclear transition. For that to happen, you will want to have an explanation for why such transitions do not result in positron production or in penetrating photons from EM transitions. Eric
