Determining the relaxation time from a temperature-dependent scan of the neutron spin-echo signal amplitude

Temperature-dependent scans of the neutron scattering intensity are commonly employed in high energy-resolution quasielastic measurements. Besides serving as a useful diagnostic tool for identifying temperature range that could give rise to measurable relaxation signal, such “elastic” (resolution-defined) be determining at which time system becomes equal resolution-defined characteristic spectrometer measurement. This is model-independent alternative “traditional” approach, when, given measurement temperature, obtained from fitting full dynamic spectra with model function. Here we introduce temperature-dependent scan spin-echo signal amplitude. Using well-characterized complex pattern, demonstrate approach proposed herein maps well on previous “traditionally” measured times. Thus, despite monitoring different variable (neutron amplitude vs. intensity), benefits model-free traditionally utilized time-of-flight and backscattering experiments, can extended measurements very slow relaxations assessable only by high-resolution spin-echo.