  We demonstrate that ``hot'' MHD outflows from neutron-rich black-hole debris
disks can significantly alleviate the baryon-loading problem in gamma-ray burst
(GRB) sources. We argue that the neutron-to-proton ratio in disk-fed outflows
might be as high as ~30 and show, with the help of an exact semianalytic
relativistic-MHD solution, that the neutrons can decouple at a Lorentz factor
gamma_d ~ 15 even as the protons continue to accelerate to Lorentz factor ~200
and end up acquiring ~30% of the injected energy. We clarify the crucial role
that the magnetic field plays in this process and prove that purely
hydrodynamic outflows must have gamma_d > a few hundreds. The motion of the
decoupled neutrons is not collinear with that of the decoupled protons, so, in
contrast to previous suggestions based on purely hydrodynamic models, the two
particle groups do not collide after decoupling. If the decoupled neutrons move
at an angle > 1/gamma_d = 3.8 degr (15/gamma_d) to the line of sight to the GRB
source, most of their emission after they decay into protons will remain
unobservable.
