Soft X-raySpectroscopy Assignment Questions

Soft X-raySpectroscopy Assignment Questions

QUESTION
The following questions refer to the (Soft X-raySpectroscopy)
a) Explain, with reference to experimental data, how sensitivity to a particular element can be
enhanced in XPS when using synchrotron radiation.
b) Explain, with reference to experimental data, how surface sensitivity can be controlled when
using synchrotron radiation
c) Synchrotron radiation provides a number of advantages over conventional laboratory light
sources used for ARPES, e.g. a noble-gas discharge lamp. Identify two properties of synchrotron
radiation that provide
an advantage and explain why they provide an advantage.
d) Describe the differences in HOPG NEXAFS spectra
obtained with at normal incidence and grazing incidence. Explain how thesedifferences arise.
Include a sketch that illustrates the geometry of theinteraction between the synchrotron radiation
and molecular orbitals.