Bruker Vertex v70 FTIR spectrometer coupled to main UHV/APXPS setup (catalysis cell) for Inferred Reflection Absorption Spectroscopy (IRRAS). Fully in-vacuum beampath prevents IR light from absorption by O2/H2O in air. Both IR and X-ray spots are overlapping inside AP cell, thus enabling simultaneous AP-XPS and IRRAS measurements.

The IR light can be polarised in the”p” and “s” planes (parallel and in-plane with the surface) allowing for Polarization Modulation (PM) IRRAS.

SpectrometerBruker Vertex v70 with in-vacuum beampath
Range1000 cm-1 – 8000 cm-1 (limited by transmission through CaF2 windows)
Typical Pressure~1 mbar
Polarization-Motorized linear polarizer (standard configuration).
-Optional PEM setup: 42 kHz PEM, F350 Polarizer. Available on request.
DetectorD31x/B-A MCT detector, medium band. LN2 cooled. Spectral range 12000 – 600 cm-1
SoftwareOpus/IR, Opus/3D
Sample requirementsFlat, IR reflective sample/substrate (e.g. metal single crystal, or thin film grown on metal surface).
Large samples are best (at least 5mm).
Contact beamline staff to discuss sample requirements.
AvailabilityAvailable for General Users