The continuous development of synchrotron-based experimental techniques in the X-ray range provides new possibilities to probe the structure and the dynamics of bulk materials down to inter-atomic distances. However, the interaction of intense X-ray beams with matter can also induce changes in the structure and dynamics of materials. A reversible and non-destructive beam induced dynamics has recently been observed in X-ray photon correlation spectroscopy experiments in some oxide glasses at suWciently low absorbed doses, and is here investigated in a (Li2O)0:5(B2O3)0:5 glass. The characteristic time of this induced dynamics is inversely proportional to the intensity of the X-ray beam, with a coeWcient that depends on the chemical composition and local structure of the probed glass, making it a potentially new tool to investigate fundamental properties of a large class of disordered systems. While the exact mechanisms behind this phenomenon are yet to be elucidated, we report here on the measurement of the exchanged wave-vector (and thus length-scale) dependence of the characteristic time of this induced dynamics, and show that it follows the same power-law observed in vitreous silica. This supports the idea that a unique explanation for this effect in different oxide glasses should be looked for.

X-rays induced atomic dynamics in a lithium-borate glass / Dallari, F.; Pintori, G.; Baldi, G.; Martinelli, A.; Ruta, B.; Sprung, M.; Monaco, G.. - In: CONDENSED MATTER PHYSICS. - ISSN 1607-324X. - 22:4(2019), pp. 43606-1-43606-9. [10.5488/CMP.22.43606]

X-rays induced atomic dynamics in a lithium-borate glass

Pintori G.;Baldi G.;Martinelli A.;
2019

Abstract

The continuous development of synchrotron-based experimental techniques in the X-ray range provides new possibilities to probe the structure and the dynamics of bulk materials down to inter-atomic distances. However, the interaction of intense X-ray beams with matter can also induce changes in the structure and dynamics of materials. A reversible and non-destructive beam induced dynamics has recently been observed in X-ray photon correlation spectroscopy experiments in some oxide glasses at suWciently low absorbed doses, and is here investigated in a (Li2O)0:5(B2O3)0:5 glass. The characteristic time of this induced dynamics is inversely proportional to the intensity of the X-ray beam, with a coeWcient that depends on the chemical composition and local structure of the probed glass, making it a potentially new tool to investigate fundamental properties of a large class of disordered systems. While the exact mechanisms behind this phenomenon are yet to be elucidated, we report here on the measurement of the exchanged wave-vector (and thus length-scale) dependence of the characteristic time of this induced dynamics, and show that it follows the same power-law observed in vitreous silica. This supports the idea that a unique explanation for this effect in different oxide glasses should be looked for.
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Dallari, F.; Pintori, G.; Baldi, G.; Martinelli, A.; Ruta, B.; Sprung, M.; Monaco, G.
X-rays induced atomic dynamics in a lithium-borate glass / Dallari, F.; Pintori, G.; Baldi, G.; Martinelli, A.; Ruta, B.; Sprung, M.; Monaco, G.. - In: CONDENSED MATTER PHYSICS. - ISSN 1607-324X. - 22:4(2019), pp. 43606-1-43606-9. [10.5488/CMP.22.43606]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/259385
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