Why do I plot certain Raman against the wavenumber

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SUMMARY

This discussion centers on the use of Raman spectroscopy, specifically the differences in plotting intensity against Raman shift for a 785 nm laser versus wavenumber for a 532 nm laser using the Spectrasuite software. The user highlights the importance of measuring spectra in wavenumber due to its direct relationship with energy levels, which aligns with theoretical principles of absorption and emission. Additionally, the practice of averaging multiple spectra, in this case 13, is emphasized to reduce random errors and noise in the measurements.

PREREQUISITES
  • Understanding of Raman spectroscopy principles
  • Familiarity with Spectrasuite software
  • Knowledge of laser wavelengths (785 nm and 532 nm)
  • Concept of averaging in experimental measurements
NEXT STEPS
  • Research the differences between Raman shift and wavenumber in spectroscopy
  • Learn about the calibration process in Spectrasuite for different laser wavelengths
  • Explore methods for reducing noise in spectroscopic measurements
  • Investigate the theoretical background of energy levels in molecular transitions
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Students and researchers in the field of spectroscopy, particularly those working with Raman spectroscopy and seeking to understand data representation and error reduction techniques.

metorido
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I am currently writing my Bachelorthesis about Raman spectroscopy. For measurement with a 785 nm Laser I plot the Intensity against the Raman shift. But for measurements involving a 532 nm, I had so select the program (Spectrasuite) so display them against the "normal" wavenumber. Why is that?

Thank you all in advance, really desperate here.

Bonus question: Why do I measure a certain amount ( in my case 13) of spectra?
 
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Wavevenumber is proportional to energy, so it is more natural to measure spectra in wavenumber instead of wavelength. Theory gives the energy levels and and absorption/emission is proportional to the difference of the energies between the levels the transition occurs.

It is usual to measure something (the spectrum for example) several times, and average. The random errors, the noise of the spectrum diminishes this way.
 
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