STIMULATED NEUTRINO CONVERSION AND BOUNDS ON NEUTRINO MAGNETIC-MOMENTS

Recent experiment proposed to observe induced radiative neutrino trans itions are confronted to existing bounds on neutrino magnetic moments from earth-based experiments. These are found to exclude any observati on by several orders of magnitude, unless the magnetic moments are ass umed to be strongly momentum dependent. This possibility is discussed in some generality, and we find that nontrivial dependence of the neut rino form factor may indeed occur, leading to quite unexpected effects , although this is insufficient by orders of magnitude to justify the experiments.