Measuring scattering angles with neutron spin echo

✍ Scribed by Michael R Fitzsimmons; Helmut Fritzsche; Marita Gierlings; Janos Major; Roger Pynn

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 222 KB
• Volume: 529
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2004.04.149

✦ Synopsis

We report results of experiments designed to test the use of thin magnetic films as elements of a neutron spin echo (NSE) apparatus for determining neutron scattering angles. We show that 10-mm thin films of Permalloy (Ni 0.8 Fe 0.2 ) electrodeposited on silicon wafers function well as p/2 spin rotators. 30 mm thick films of the same material used as precession fields in the NSE set-up allow the neutron scattering angle to be determined with a resolution of about 0.05 . We show that, even when the NSE angular resolution is comparable to the angular divergence of neutron beams used in a reflectometry experiment, the use of NSE aids in the separation of specular and diffuse scattering.