Report/Journal Article

PUBDB-2019-04971

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Beam-induced atomic motion in alkali borate glasses

Holzweber, K. (Corresponding author) ; Tietz, C. ; Fritz, T. M.Extern* ; Sepiol, B. ; Leitner, M.

2019
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.100.214305  doi:10.3204/PUBDB-2019-04971

Report No.: I-20140227 EC; I-20160086 EC; I-20160164 EC

Abstract: Applying coherent x rays using the method of atomic-scale x-ray photon correlation spectroscopy results inbeam-induced dynamics in a number of oxide glasses. Here these studies are extended to rubidium and cesiumborates with varying alkali contents. While no effect due to cumulative beam damage is observed, the observedrate of structural rearrangements shows a linear relation to the instantaneous dose rate. In agreement with theincreasing glass transition temperature, the rate of dynamics at a given dose rate decreases with increasingalkali content, while the shape of the decay of correlations becomes progressively stretched. This behavior isexplained in terms of faster dynamics of the alkali positions compared to the borate network. Finally, the q-dependentbehavior of the correlation decay rate implies that the observed dynamics proceeds via small-scaleatomic displacements subject to de Gennes narrowing.

Note: © American Physical Society

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P10 (PETRA III)
2. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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