Contribution to a book

FZJ-2021-04255

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Data Collection Strategies, Analysis, and Interpretation in AP-XAS

Müller, D. (Corresponding author)FZJ*

2021
ACS Publications Washington, DC
ISBN: 9780841298125

Please use a persistent id in citations: http://hdl.handle.net/2128/29061

Abstract: This chapter will focus on strategies to collect meaningful X-ray absorption data in an ambient medium covering both the hard and soft X-ray regime and how to guide analysis, keeping experimental and physical differences of various strategies in mind. A special interest will be put on how the interaction of primary radiation and signal carriers with the surrounding medium will influence data acquisition and interpretation. Since hard and soft X-rays can be used to probe different electron shells in a material, both experiments can yield important and complementary information. Dipole selection rules lead to vastly different behavior of K- and L-edge XAS of transition metals, for example. In their ambient pressure variants, two major issues (that are fundamentally intertwined) arise when interpreting the data collected from both techniques: Whereas hard X-rays can penetrate condensed matter on a macroscopic scale making true transmission experiments possible, soft X-rays are confined to either electron or fluorescence yield detection modes, the latter suffering from low yields from lighter elements. Those not only pose different experimental challenges to avoid signal loss due to absorption in the reaction medium, but also probe depths of different orders of magnitude.

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Contributing Institute(s):

1. Elektronische Eigenschaften (PGI-6)
2. Elektronische Materialien (PGI-7)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Appears in the scientific report 2021

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Database coverage:

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