X-ray induced dynamics in borate glasses with different network connectivity

نویسندگان

چکیده

Hard x rays induce atomic dynamics in oxide glasses at doses low enough that the average structure is unchanged. X-ray photon correlation spectroscopy used here to study this effect a series of alkali borate characterized by different network connectivity. The product x-ray dose rate per atom and decay time density function sample-dependent parameter with dimensions an energy: It varies between fraction eV few tens sensitive connectivity glass. can then be access some bonding information also cases where perturb material, regime great interest modern x-ray-based experiments.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Polyhedral units and network connectivity in calcium aluminosilicate glasses from high-energy X-Ray diffraction

Structure factors for Ca (x/2)Al xSi 1-xO (2) glasses (x = 0,0.25,0. 5,0.67) extended to a wave vector of magnitude Q = 40 A (-1) have been obtained by high-energy x-ray diffraction. For the first time, it is possible to resolve the contributions of Si-O, Al-O, and Ca-O coordination polyhedra to the experimental atomic pair distribution functions. It has been found that the connectivity of Si/A...

متن کامل

Femtosecond laser-induced reduction in Eu-doped sodium borate glasses

In this work, we report permanent reduction of Eu to Eu in sodium borate glasses by irradiation of near-infrared femtosecond laser. Glass composition of sodium borate was 85B2O3–15Na2O. The glasses were doped with 0.05, 0.1, and 0.5mol% Eu2O3. Absorption and fluorescence dynamics were studied to investigate valence state change of europium ions and the energy transfer between Eu and Eu ions. As...

متن کامل

Analyzing Cortical Network Dynamics with Respect to Different Connectivity Assumptions

Current studies of cortical network dynamics are usually based on purely random wiring. Generally, these studies are focused on a local scale, where about 10 percent of all possible connections are realized. Neuronal connections in the cortex, however, show a more complex spatial pattern composed of local and long-range patchy connections. Here, we ask to what extent the assumption of such geom...

متن کامل

A molecular dynamics study of Li-doped borate glasses

The objective of this work is to investigate the effect of alkali content and temperature on the microstructure of lithium borate glasses, xLi2O · (1 − x)B2O3. We have applied the molecular dynamics technique with Ewald summation and periodic boundary conditions to a collection of ca. 256 particles confined within a primitive cubic cell and interacting through a BornMayer-Huggins type of potent...

متن کامل

Changes in Effective Connectivity Network Patterns in Drug Abusers, Treated With Different Methods

Introduction: Various treatment methods for drug abusers will result in different success rates. This is partly due to different neural assumptions and partly due to various rate of relapse in abusers because of different circumstances. Investigating the brain activation networks of treated subjects can reveal the hidden mechanisms of the therapeutic methods. Methods: We studied three groups o...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical review

سال: 2022

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevb.105.104207