English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The thesis 'Investigations to Improve Energy Resolution for NeutronBackscattering Spectrometers Using Ideal Crystals with Low Dynamic Width of theReflection Curve' first introduces the concept of the neutron backscatteringspectrometer and their scanning methods by Doppler variation of the neutronenergy on a moving Bragg-reflecting crystal. It further reveals the foundationsof the dynamical theory of diffraction, with concepts on dispersion surfacesdescribing total reflection, refraction, and Laue-Bragg diffraction. Thenatural line width of a reflecting crystal is given by the structure factor,which limits the energy resolution of a Si-111 monochromator to a minimal 300neV. The present project is to investigate the energy resolution of theGaAs-200 reflection, theoretically limited to 13 neV. An experimental setup ispresented encompassing optics, mechanics, and detector electronics, and anexperimental line width of 43 neV has been obtained. The value is discussedwith error sources such as temperature stability, vibrations, misalignment, andcrystal defects.

Untersuchungen zur Verbesserung der Energieaufl\"osung f\"ur  Neutronenr\"uckstreuspektrometer unter Verwendung von Idealkristallen mit  geringer dynamischer Breite der Reflexionskurve