ISIS Neutron and Muon Source Data Journal

The partial dynamical structure factors and vibrational density of states in network glasses

Abstract: We wish to measure the partial dynamical structure factors and the partial vibrational density of states (VDOS) for the archetypal network forming glass GeSe2 by using the method of isotope substitution in neutron scattering and the MERLIN spectrometer. Essentially, by averaging the separated Ge-Ge and Se-Se partial dynamical structure factors over Q, it is possible to obtain the exact VDOS for Ge and Se, respectively. The work builds on an initial test experiment using MERLIN (RB920266) where there was a substantial background scattering problem associated with use of an Al cryostat tail. Instead, in the new experiment, a ¿cold finger¿ will be used to remove this background scattering problem while still giving access to low temperatures. This is important to ensure that the harmonic approximation is valid and to minimise the multi-phonon contribution to the sample scattering.

Public release date: 25 May 2014

Principal Investigator: Professor Phil Salmon
Experimenter: Mr Dean Whittaker
Experimenter: Professor Steve Bennington
Experimenter: Dr Anita Zeidler

DOI: 10.5286/ISIS.E.24086022

ISIS Experiment Number: RB1110412

Part Number: 1 - MERLIN

Date of Experiment: 16 May 2011

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Phil Salmon et al; (2011): The partial dynamical structure factors and vibrational density of states in network glasses, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.24086022