The net-small-signal gain of a molecular fluorine F2 laser pumped by
a coaxial electron beam has been measured in gas mixtures of He/F2 and
He/Ne/F2. A peak net-small-signal gain of 0.63 cm-1 has been measured
in a mixture of He/Ne/F2 at a pressure of 8 bar and a pumping power d
ensity of 13 MW/cm3.