A3He‐Xe gas mixture, excited by the3He(n,p)3H reaction, has been employed to amplify the output of a3He‐Xe direct nuclear‐pumped laser. Lasing occurred on the 2.63‐&mgr; of XeI in the oscillator. The oscillator output was reflected through 180 ° and passed through the amplifier system. Power measurements of the oscillator output and the amplifier output show the laser power to be amplified by a factor of 3 for the3He‐Xe system. Amplification by a factor of 5 was obtained for a3He‐CO system.