Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. analysis and testing techniques
6. spectroscopy

Narrower term/s

• near-infrared spectroscopy
• photoacoustic spectroscopy
• mid-infrared spectroscopy
• far-infrared spectroscopy
• Fourier transform infrared spectroscopy[+]
  • Fourier transform infrared microspectroscopy
• short-wave infrared spectroscopy

Anotations

Scope note:

Spectroscopy technique concerned with the spectrum between the visible and the short-wavelength microwave. Infrared spectroscopy can detect the internal vibration of molecules. The field was traditionally broken into near-, mid-, and far-infrared spectroscopy, although with the development of Fourier-transform spectrometers, this distinction of areas has blurred and the more sophisticated instruments can cover from 10 to 25,000 cm-1 by an interchange of source, beam splitter, detector, and sample cell.