title: Crystal monochromator with a resolution beyond 10(8).
abstract: Monochromatization with crystal diffraction has been achieved to a resolution (lambda/delta lambda) beyond 10(8). The monchromator is specifically designed for 23.880 keV synchrotron radiation (lambda = 51.9 pm) for applications involving nuclear resonant scattering from 119Sn. The design uses asymmetrically cut silicon (12 12 12) crystal reflections from two single-crystalline monoliths oriented in a dispersive geometry. A transmitted energy bandwidth of 140 +/- 20 mu eV was measured, corresponding to a resolution of 1.7 x 10(8). Methods of improving efficiency, wavelength stability and resolution are discussed.
authors.affiliation: Argonne National Laboratory, Argonne, IL 60439, USA. toellner@aps.anl.gov
authors.forename: T S
authors.initials: TS
authors.lastname: Toellner
authors.forename: M Y
authors.initials: MY
authors.lastname: Hu
authors.forename: W
authors.initials: W
authors.lastname: Sturhahn
authors.forename: G
authors.initials: G
authors.lastname: Bortel
authors.forename: E E
authors.initials: EE
authors.lastname: Alp
authors.forename: J
authors.initials: J
authors.lastname: Zhao