TY  - JOUR
AU  - Martinelli, Alessandro
AU  - Baldi, G.
AU  - Dallari, Francesco
AU  - Rufflé, B.
AU  - Zontone, F.
AU  - Monaco, G.
TI  - Probing the dynamics of B<sub>2</sub>O<sub>3</sub> across the glass transition: an X-ray photon correlation spectroscopy study
JO  - The philosophical magazine
VL  - 100
IS  - 20
SN  - 1478-6443
CY  - Abingdon
PB  - Taylor & Francis
M1  - PUBDB-2021-00534
SP  - 2636 - 2645
PY  - 2020
N1  - Waiting for fulltext
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000532279800001
DO  - DOI:10.1080/14786435.2020.1757172
UR  - https://bib-pubdb1.desy.de/record/454460
ER  -