Imaging density disturbances in water with a 41.3-attosecond time resolution
Abbamonte P, Finkelstein KD, Collins MD, Gruner SM
PHYSICAL REVIEW LETTERS
92 (23): Art. No. 237401 JUN 11 2004
Also See: P. Abbamonte, K. D. Finkelstein, M. D. Collins, and S. M. Gruner, "X-Rayed Movie," Phys.
Rev. Focus (14), (14 June 2004).
We show that the momentum flexibility of inelastic x-ray scattering
may be exploited to invert its loss function, allowing real time imaging of
density disturbances in a medium. We show the disturbance arising from a point
source in liquid water, with a resolution of 41.3 attoseconds (4.13x10(-17)
s) and 1.27 Angstrom (1.27x10(-8) cm). This result is used to determine the
structure of the electron cloud around a photoexcited chromophore in solution,
as well as the wake generated in water by a 9 MeV gold ion. We draw an analogy
with pump-probe techniques and suggest that energy-loss scattering may be applied
more generally to the study of attosecond phenomena.