Cationic Dependence of X-ray Induced Damage of Strontium and Barium Nitrate.
Authors of this article are:
Goldberger D, Park C, Evlyukhin E, Cifligu P, Pravica M.
A summary of the article is shown below:
The response of solids to x-ray irradiation is not well understood, in part because the interactions between x-rays and molecules in solids depend on the intra- and/or inter-molecular electronic properties of the material. Our previous work demonstrated that x-ray induced damage of ionic salts depends on the irradiating photon energy, especially when irradiating with photons of energy near the cation’s K-edge. To advance the understanding of the cationic dependence of x-ray photochemistry, we present studies of x-ray induced damage of barium nitrate and strontium nitrate as a function of irradiating photon energy. Polycrystalline samples of barium and strontium nitrate were irradiated with high flux monochromatic x-rays at selected energies near the K-edge of the cations. Powder X-ray Diffraction (XRD) patterns were collected over the course of irradiation to study the kinetics of the damage process, and reaction products were characterized via Raman spectroscopy. Our results demonstrate that irradiating barium and strontium nitrate with photons of energy greater than the K-edge of the cation leads to different alterations than those observed when irradiating with photons of energy less than the K-edge. Additionally, the differences between x-ray induced damage of the two compounds are examined and discussed.
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