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[The method of wavelength calibration in high resolution absorption spectroscopy]
Sheng-hai Wu1, Hua Zhuang, Xiao-hua Yang
1Key Laboratory for Optical and Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China.
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|August 27, 2003
Summary
A novel method calibrates wavelength in high-resolution molecular spectra using iodine standards. This technique achieves high accuracy for spectral data, including N2+ molecular ion absorption.
Area of Science:
- Spectroscopy
- Molecular Physics
- Analytical Chemistry
Context:
- High-resolution molecular absorption spectra require precise wavelength calibration for accurate analysis.
- Existing calibration methods may lack efficiency or user-friendliness.
- The iodine molecule (I2) serves as a reliable standard for wavelength referencing.
Purpose:
- To present a new, automated method for calibrating wavelengths in high-resolution molecular absorption spectra.
- To introduce user-friendly visual software for spectral data preprocessing and wavelength calibration.
- To demonstrate the method's effectiveness using the N2+ molecular ion spectrum.
Summary:
- A new wavelength calibration method utilizes the standard spectrum of the iodine molecule.
- Preprocessing steps include data smoothing, baseline determination, and peak fitting, with segment offset applied for calibration.
- An interactive visual software automates the calibration process, achieving an absolute accuracy of approximately 0.006 cm-1 for N2+ spectra.
Impact:
- Enables more accurate measurements of molecular absorption spectra.
- Provides a user-friendly and automated tool for researchers in molecular spectroscopy.
- Advances the field of high-resolution spectroscopy with improved calibration accuracy and accessibility.