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The article reports on the x-ray free-electron laser (FEL) developed by the researchers at Argonne National Laboratory and the University of California at Los Angeles. It is said that FEL has the potency to cater a coherent source of x-rays in average spectral luminosity than a standard sel-amplified spontaneous-emission (SASE) configuration. The laser, which is configurated in an oscillator called X-FELO, bears a pulse intensity that could improve hard x-ray photoemission spectrometry.

Focuses on the development of a nuclear-pumped laser, a nuclear reactor whose gaseous core literally becomes the laser itself, by the U.S. National Aeronautics and Space Administration. Explanation of the process causing the lasing; Plan to introduce uranium hexafluoride in the nuclear reactor; Increase in efficiency of nuclear reactors by using uranium hexafluoride.