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Nexus 670 ThermoNicolet Fourier Transform Infrared Spectrometer

We currently use a high resolution (0.1 cm-1) Nicolet Nexus 670 that is flexible in both its current iteration and is upgradeable for future needs. The optics are fully optimized and computer controlled for ease of use. Changing spectral range is as easy as removing an optical component and placing the new one into its position. The software automatically updates ranges, sensitivity and parameters. Some of this is sensitive, so for first time users we ask that they approach us for a quick run through, especially if optics are to be switched out. The main components are listed below with the available options. Please see manual.


  • Source: Everglo (gives good/fair intensity over all wavelengths of interest to neutron scientists)
  • Beam Splitters: KBr and Far-ir
  • Detectors: DTGS with KBr (12,000 cm-1 to 350 cm-1) or polyethylene (700 cm-1 to 10 cm-1), MCTA liquid nitrogen cooled for high sensitivity (11,700 cm-1 to 600 cm-1)
  • Purge: The spectrometer is continuously purged with dried, CO2-free air.
Window Material Useful Range cm-1 Size Comments
KBr 43,500 - 400 32 mm x 3 mm (Undrilled Only) Soluble in water, alcohol and glycerine. Slightly soluble in ethere. Hygroscopic.
NaCl 40,000 - 600 32 mm x 3 mm (Drilled and Undrilled) Soluble in water and glycerine. Slightly soluble in ether.
Quartz 43,500 - 3000 32 mm x 3 mm (Drilled and Undrilled) Unaffected by most solvents.
ZnSe 20,000 - 500 32 mm x 3 mm (Drilled and Undrilled) Insoluble in water. High resistance to chemical attack. Organic solvents, dilute acids and bases have no effect.

Information on the environment control can be found at the old site.

Created May 16, 2011, Updated April 5, 2022