Open AccessDiffuse scattering from liquid solutions with white‐beam undulator radiation for photoexcitation studies
Author(s) -
Plech Anton,
Randler Rudolf,
Geis Armin,
Wulff Michael
Publication year - 2002
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049502011226
Subject(s) - photoexcitation , scattering , femtosecond , undulator , optics , picosecond , synchrotron radiation , chemistry , atomic physics , materials science , optoelectronics , laser , molecular physics , physics , excited state
Scattering from molecules in solution is a natural way to study fast reactions in solution with X‐ray probes. With the availability of reliable femtosecond laser systems and pulsed synchrotron sources with high brilliance, it has become possible to study picosecond time‐resolved photoexcitation in condensed matter. Owing to the low scattering cross section and the high background from the non‐excited solvent, high flux and long exposure times are required to obtain information about isolated molecules in the conventional monochromatic scattering scheme. It is proposed that the full spectrum of a single‐line undulator be used to obtain the diffuse scattering distribution. The bandwidth of 2–5% of the first harmonic, which is easily achievable in current insertion devices, is sufficient to allow the derivation of molecular form factors even in diluted systems. The relaxed bandwidth augments the usable flux drastically.