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

Scientific Reports
Antonio Benedetto, Gordon J Kearley

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.

References

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May 27, 2011·The Journal of Physical Chemistry. B·Salvatore MagazùAntonio Benedetto
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Sep 25, 2017·The Journal of Physical Chemistry Letters·Antonio Benedetto
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Methods Mentioned

BETA
X-ray
neutron-scattering
Resolution
Elastic Neutron Scattering
neutron spectroscopies
neutron scattering
elastic

Software Mentioned

McStas
QENS

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