Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

Time resolved photoelectron spectroscopy with ultrafast soft x-ray light

2001 This thesis entitled: Time resolved photoelectron spectroscopy with ultrafast soft x-ray light written by Lora Nugent-Glandorf has been approved for the Department of Chemistry and Biochemistry Date The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentione...

X - Ray Photoelectron Spectroscopy of Silicate Glasses

X-ray photoelectron spectroscopy (XPS) is a powerful technique capable of providing unique information about the structural chemistry of glasses. However, inappropriate procedures for the preparation of sample surfaces or the lack of reliable methods to overcome electrostatic charging effects during analysis of dielectric materials can cause spurious features to be introduced or intrinsic featu...

Laser plasma x-ray source for ultrafast time-resolved x-ray absorption spectroscopy

We describe a laser-driven x-ray plasma source designed for ultrafast x-ray absorption spectroscopy. The source is comprised of a 1 kHz, 20 W, femtosecond pulsed infrared laser and a water target. We present the x-ray spectra as a function of laser energy and pulse duration. Additionally, we investigate the plasma temperature and photon flux as we vary the laser energy. We obtain a 75 μm FWHM x...

Surface and core hole effects in X-ray photoelectron spectroscopy

Soft X-ray Photoelectron Spectroscopy in Silicon Clathrate Superconductors

Silicon clathrate compounds consist of fullerenelike polyhedral Si-cages, which share their faces to form a three-dimensional Si-sp 3 covalent network. Guest elements such as an alkali atom or an alkaliearth one can be encapsulated in the cage. Recently, these compounds have attracted strong interest due to the discovery of superconductivity in a metal-doped silicon clathrate, Ba6Na2Si46 [1], a...