U.S. invents first atomic X-ray laser to achieve 45-year prediction

Scientists at the US Department of Energy's SLAC National Accelerator Laboratory have created the world's shortest wavelength and purest X-ray laser. This achievement has achieved a 45-year prediction and opened the door to a series of new scientific discoveries. Related research was published in the recent "Nature" magazine.

X-rays can help people observe the atomic and molecular world in depth. Scientists predicted in 1976 that X-ray lasers can be manufactured by the method of making visible light lasers, that is, a method of releasing monochromatic light by transitioning electrons from high energy levels to low energy levels within the atoms. To create this atomic laser, scientists used powerful X-ray pulses to knock out electrons from the neon atoms in the sealed cabin, thereby leaving "small holes" in the neon atom shell. When the electrons fall back again to fill these "small holes", about 1 in 50 atoms respond by emitting a photon in the X-ray range. In this way, X-rays excite more neon atoms nearby to release more X-rays, and such a domino effect magnifies the laser by 200 million times.

The research leader Nina Rohringer (Nina Rohringer) said that in the future she will make shorter wavelength, higher energy atomic X-ray laser.

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Completor: Nina Rolling Group

Laboratory: Lawrence Livermore National Laboratory, Colorado State University, NSF Extreme Ultraviolet Science and Technology Engineering Research Center, SLAC National Accelerator Laboratory

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