ISIS Neutron and Muon Source Data Journal

Alkali ions dependent collective excitations in borate glasses

Abstract: Recently, it has been suggested that the First Sharp Diffraction Peak (FSDP) in glasses arises from a quasi-periodicity of void spaces in the structure, that plays the role of the lattice spacing of crystals, and that the Boson Peak (BP) in glasses could result from a piling up of the vibrational states near the boundary of the pseudo-Brillouin zone (PBZB).We propose to identify the contribution of collective excitations along the position of the PBZB in two borate glasses, characterized by different FSDP and BP positions, in order to verify if the FSDP acts as a sort of Brillouin zone center for glasses and if the observed BP arises from the piling up of the vibrational states near the related PBZB.Considering the kinematic range of interest, the MARI spectrometer is suited to enable a successful experiment.We request three different incident neutron energies and a beam time of 4 days.

Principal Investigator: Professor Giovanna D'angelo
Local Contact: Dr Duc Le
Experimenter: Dr Nicolo' Violini
Experimenter: Dr Giovanna Ruello
Experimenter: Dr Cristina Crupi

DOI: 10.5286/ISIS.E.RB1520266

ISIS Experiment Number: RB1520266

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 Giovanna D'angelo et al; (2015): Alkali ions dependent collective excitations in borate glasses, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1520266

Data is released under the CC-BY-4.0 license.