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Updated: Jan 21, 2026

Measuring the Time-Evolution of Nanoscale Materials with Stopped-Flow and Small-Angle Neutron Scattering
Published on: August 6, 2021
Dynamics from elastic neutron-scattering via direct measurement of the running time-integral of the van Hove
Antonio Benedetto1,2,3,4,5, Gordon J Kearley6
1School of Physics, University College Dublin, Dublin 4, Ireland. antonio.benedetto@ucd.ie.
Abstract:
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.
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