High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique
| Autor: | Jiazhou Shen, Roger Pynn, Alexander Thaler, Masaaki Matsuda, Fankang Li, Steven R. Parnell, Olivier Delaire, Thomas Keller, Jaime A. Fernandez-Baca |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Larmor precession Physics Spectrometer Phonon inelastic neutron spin echo Resolution (electron density) 02 engineering and technology Neutron scattering high energy resolution 021001 nanoscience & nanotechnology inelastic neutron scattering 01 natural sciences General Biochemistry Genetics and Molecular Biology Inelastic neutron scattering Computational physics Neutron spin echo neutron Larmor labeling 0103 physical sciences Neutron 0210 nano-technology |
| Zdroj: | Journal of Applied Crystallography, 52(4) |
| ISSN: | 0021-8898 |
| DOI: | 10.1107/s1600576719008008 |
| Popis: | The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the neutron spin, the energy resolution of such measurements can be further improved without reducing the resolution ellipsoid. Measurements of the temperature-dependent phonon energy change are demonstrated using superconducting magnetic Wollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is |
| Databáze: | OpenAIRE |
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