We give a comparative analysis of basic schemes of optical control of Mossb
auer spectra providing an elimination of resonant absorption by a gamma-ray
nuclear transition and suggest a novel scheme of frequency non-selective o
ptical pumping which turns out to be the most promising for a realization o
f induced gain in the gamma-ray range. (C) 2000 Elsevier Science B.V. All r
ights reserved.