ResPES post-processing

Aligning spectra

Introduction

In order to subtract an off-resonace spectrum properly and to analyze CIS profiles, all ResPES spectra must be aligned on the binding/kinetic energy axis. They can be aligned to the first spectrum in the sequence, for instance. For this purpose, a reference wave with binding energy offsets for each spectrum is required. Once the reference wave is ready, the spectra can be aligned easily using BRIXIAS package procedures as shown below.

How it works

1. Prepare the reference wave. The built-in algorithms in Matrix operation panel (see below) might be sufficiently good in some cases but more accurate results are generally reached using KolXPD multi-peak fitting functions.
2. In Igor Pro, select menu XPS utilities -> Matrix operations -> General matrix operation panel...
3. In Matrix operation panel, select your ResPES wave A.
4. In Operations panel, select Align from the Task ring button B.
5. Select your reference wave C in Load Ref. wave... (The name of the reference wave will remain Ref_aling. Don'w worry about that, the wave you selected will be used.
6. Press Align! button D.
7. Save the aligned ResPES group using Store Image button E.