  The purpose of this article is to give a result of localization in space of
the ground states photons, in some sense, of a Hamiltonian modelling nuclear
magnetic resonance in quantum electrodynamics. The asymptotics at infinity
obtained for the density of the number of photons around x is the power -5 of
the distance of x to the particles. Moreover, the number of photons at large
distance is smallest in the ground state total mean spin direction.
