Year-end Sale % OFF 
Abstract
This chapter discusses neutron-spin-echo (NSE) spectroscopy and magnetism. In NSE spectroscopy, the precessions of neutron spins in a magnetic field are used as a stop-watch, which is inherent in each individual neutron and measures the energy transfer with accuracy better than 10−5. Neutron-spin-echo spectroscopy is fundamentally different from all classical methods because it decouples the accuracy with which neutron velocity changes are measured from the velocity distribution of the incoming neutrons. NSE reaches the highest energy resolution while maintaining the high intensity advantage of a beam that is only 10–20% monochromatic and poorly collimated. The decoupling of energy resolution from the spectral width holds exactly for quasielastic and for inelastic nondispersive scattering. In inelastic neutron scattering spectroscopy the spectral response of the sample is given by the probability of a change of the neutron energy in the scattering process, as expressed by the dynamic structure factor. At a given wavelength an NSE spectrometer must be tuned for each of the magnetic field integrals used for the measurement. The superparamagnetic fluctuations in monodomain iron particles are also elaborated in the chapter.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
