
High‐throughput nuclear resonance time domain interferometry using annular slits
Author(s) -
Pavlik Marc,
Brown Dennis E.,
Hu Michael Y.,
Zhao Jiyong,
Lurio Laurence,
Alp E. Ercan
Publication year - 2022
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577522002843
Subject(s) - relaxation (psychology) , momentum (technical analysis) , interferometry , optics , materials science , foil method , temporal resolution , time domain , resonance (particle physics) , time delay and integration , atomic physics , chemistry , nuclear magnetic resonance , analytical chemistry (journal) , physics , psychology , social psychology , finance , chromatography , economics , composite material , computer science , computer vision
Nuclear resonance time domain interferometry (NR‐TDI) is used to study the slow dynamics of liquids (that do not require Mössbauer isotopes) at atomic and molecular length scales. Here the TDI method of using a stationary two‐line magnetized 57 Fe foil as a source and a stationary single‐line stainless steel foil analyzer is employed. The new technique of adding an annular slit in front of a single silicon avalanche photodiode detector enables a wide range of momentum transfers (1 to 100 nm −1 by varying the distance between the annular slits and sample) with a high count rate of up to 160 Hz with a Δ q resolution of ±1.7 nm −1 at q = 14 nm −1 . The sensitivity of this method in determining relaxation times is quantified and discussed. The Kohlrausch–Williams–Watts (KWW) model was used to extract relaxation times for glycerol. These relaxation times give insight into the dynamics of the electron density fluctuations of glycerol as a function of temperature and momentum transfers.