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Home > News > Slicing X-Rays by the Millionths of a Billionth of a Second

September 23rd, 2005

Slicing X-Rays by the Millionths of a Billionth of a Second

Scientists working at Berkeley Lab's Advanced Light Source (ALS) have reported the first femtosecond x-ray spectroscopy experiment. Using a beam of ALS x-rays that were "laser-sliced" into pulse lengths of about 150 femtoseconds, the research team performed time-resolved x‑ray absorption spectroscopy measurements on samples of vanadium dioxide. This material has been shown to change from an electrical insulator to a conductor in about 80 femtoseconds.


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