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000454460 1001_ $$0P:(DE-H253)PIP1081882$$aMartinelli, Alessandro$$b0$$eCorresponding author
000454460 245__ $$aProbing the dynamics of B$_{2}$O$_{3}$ across the glass transition: an X-ray photon correlation spectroscopy study
000454460 260__ $$aAbingdon$$bTaylor & Francis$$c2020
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000454460 520__ $$aX-ray photon correlation spectroscopy is used to study the dynamics of the glass former B$_{2}$O$_{3}$ across the glass transition temperature, T$_g$. The obtained data confirm that while the structural relaxation drives the density rearrangements in the liquid phase, a beam-induced dynamics is the dominant effect around and below T$_g$. The use of a hybrid photon counting detector allows us to obtain high-quality correlation functions with a characteristic decay time down to a second. The characteristic time of the induced dynamics displays a linear dependence on the inverse of the absorbed X-ray power over the whole observed range, i.e. up to powers of 0.2 eV/atom/s. Up to these values, then, an X-ray irradiated B$_{2}$O$_{3}$ glass sample explores structurally equivalent configurations on a timescale dictated by the absorbed power.
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000454460 7001_ $$0P:(DE-H253)PIP1027183$$aBaldi, G.$$b1
000454460 7001_ $$0P:(DE-H253)PIP1027104$$aDallari, Francesco$$b2
000454460 7001_ $$aRufflé, B.$$b3
000454460 7001_ $$aZontone, F.$$b4
000454460 7001_ $$aMonaco, G.$$b5
000454460 773__ $$0PERI:(DE-600)2136337-7$$a10.1080/14786435.2020.1757172$$gVol. 100, no. 20, p. 2636 - 2645$$n20$$p2636 - 2645$$tThe philosophical magazine$$v100$$x1478-6443$$y2020
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