It is shown that the width of a gamma-laser line can be measured exper
imentally and the energy resolution is better as compared to the energ
y resolution in the Mossbauer effect. The change of concentration alon
g the laser medium (and with time) is calculated. The results show the
possibilities for better utilization of the stored energy in the lase
r medium as well as the possibilities for stronger emission in one of
the directions.