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| Home > Publications database > Probing the dynamics of B$_{2}$O$_{3}$ across the glass transition: an X-ray photon correlation spectroscopy study |
| Home > Publications database > Probing the dynamics of B$_{2}$O$_{3}$ across the glass transition: an X-ray photon correlation spectroscopy study |
| Journal Article | PUBDB-2021-00534 |
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2020
Taylor & Francis
Abingdon
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Please use a persistent id in citations: doi:10.1080/14786435.2020.1757172
Abstract: X-ray photon correlation spectroscopy is used to study the dynamics of the glass former B$_{2}$O$_{3}$ across the glass transition temperature, T$_g$. The obtained data confirm that while the structural relaxation drives the density rearrangements in the liquid phase, a beam-induced dynamics is the dominant effect around and below T$_g$. The use of a hybrid photon counting detector allows us to obtain high-quality correlation functions with a characteristic decay time down to a second. The characteristic time of the induced dynamics displays a linear dependence on the inverse of the absorbed X-ray power over the whole observed range, i.e. up to powers of 0.2 eV/atom/s. Up to these values, then, an X-ray irradiated B$_{2}$O$_{3}$ glass sample explores structurally equivalent configurations on a timescale dictated by the absorbed power.
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