Dynamics from elastic neutron-scattering via direct measurement of the running time-integral of the van Hove distribution function

Autor:	Benedetto, Antonio, Kearley, Gordon J.
Rok vydání:	2019
Předmět:	Physics - Instrumentation and Detectors Condensed Matter - Soft Condensed Matter Physics - Biological Physics Physics - Chemical Physics Physics - Data Analysis Statistics and Probability
Zdroj:	Scientific Reports 9, 11284 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1038/s41598-019-46835-z
Popis:	We present a new neutron-scattering approach to access the van Hove distribution function directly in the time domain, I(t), which reflects the system dynamics. Currently, I(t) is essentially determined from neutron energy-exchange. Our method consists of the straightforward measurement of the running time-integral of I(t), by computing the portion of scattered neutrons corresponding to species at rest within a time t, (conceptually elastic scattering). Previous attempts failed to recognise this connection. Starting from a theoretical standpoint, a practical realisation is assessed via numerical methods and an instrument simulation. Comment: 11 pages, 5 figures, new results, supplementary material (14 pages, 5 figures, 21 main equations, new results)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1904.01680 Zobrazit plný text záznamu View this record from Arxiv