Single Electron Caught On Film

Stephen Ornes

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Single Electron Caught On Film

机译：薄膜上的单电子捕获

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One of the year's most remarkable motion pictures lasts just 3 seconds-and that's after it has been slowed down a billion billion times. The film documents an electron in motion the instant after it was booted from an atom by an ultraviolet pulse. Created by an international team of physicists, the movie is the first of its kind. Individual electrons move too quickly for ordinary cameras to capture in a clear image. But a new method that generates supershort bursts of laser light allowed researchers to nab a high-resolution shot of the elusive electron. Each flash of light lasted only an attosecond. To comprehend how brief that is, consider that one second contains about twice as many attoseconds as there are seconds in the 14-billion-year life of the universe, says physicist Johan Mauritsson of Lund University in Sweden, who led the study. An electron orbits a hydrogen atom in about 150 attoseconds.

机译：一年中最出色的电影仅持续3秒钟-而在放慢10亿次之后。胶片记录了一个电子在运动后的瞬间，该电子被紫外线脉冲从原子中引导出来。这部电影由国际物理学家团队创作，是同类电影中的第一部。单个电子移动得太快，普通摄像机无法捕获清晰的图像。但是，产生超短脉冲激光的新方法使研究人员可以捕获难以捉摸的电子的高分辨率照片。每次闪光仅持续一秒。瑞典隆德大学的物理学家约翰·莫里森（Johan Mauritsson）表示，要理解这有多简短，请考虑一秒钟包含的秒数是140亿年宇宙寿命中秒数的两倍。电子绕氢原子绕150原子秒旋转。

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《Discover》 |2009年第1期|p.58|共1页
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Stephen Ornes;
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Single Electron Caught On Film

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