Award Date

12-15-2018

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Physics and Astronomy

First Committee Member

Michael Pravica

Second Committee Member

Stephen Lepp

Third Committee Member

Eunja Kim

Fourth Committee Member

Paul Forster

Number of Pages

65

Abstract

X-ray induced damage is generally considered a nuisance, but in the field of Useful Hard X-ray Photochemistry we harness the highly ionizing and penetrating properties of hard X-rays (> 7 keV) to initiate novel photochemical decomposition and synthesis at ambient and extreme conditions. Preliminary experiments suggest that the energy of irradiating photons and the sample pressure play roles in determining the nature of X-ray induced damage. Here, we present the X-ray energy dependence of damage induced in strontium oxalate, strontium nitrate, and barium nitrate, as well as the pressure dependence of X-ray induced damage of strontium oxalate. Our results indicate that the rate of X-ray induced damage and in some case the products depend on the energy of the irradiating X-rays and on the sample pressure. These results allow us to control and optimize Useful Hard X-ray Photochemistry so that we can mitigate unwanted X-ray damage and harness useful reactions.

Keywords

Barium Nitrate; Monochromatic; Strontium Nitrate; Strontium Oxalate; Synchrotron; X-ray Damage

Disciplines

Atomic, Molecular and Optical Physics | Engineering Science and Materials | Materials Science and Engineering | Physical Chemistry

Language

English


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