%0 Journal Article
%A Martinelli, Alessandro
%A Baldi, G.
%A Dallari, Francesco
%A Rufflé, B.
%A Zontone, F.
%A Monaco, G.
%T Probing the dynamics of B<sub>2</sub>O<sub>3</sub> across the glass transition: an X-ray photon correlation spectroscopy study
%J The philosophical magazine
%V 100
%N 20
%@ 1478-6443
%C Abingdon
%I Taylor & Francis
%M PUBDB-2021-00534
%P 2636 - 2645
%D 2020
%Z Waiting for fulltext
%X X-ray photon correlation spectroscopy is used to study the dynamics of the glass former B<sub>2</sub>O<sub>3</sub> across the glass transition temperature, T<sub>g</sub>. 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<sub>g</sub>. 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<sub>2</sub>O<sub>3</sub> glass sample explores structurally equivalent configurations on a timescale dictated by the absorbed power.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000532279800001
%R 10.1080/14786435.2020.1757172
%U https://bib-pubdb1.desy.de/record/454460