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Updated: Mar 24, 2026
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Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
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Re-Optimized Energy Levels and Ritz Wavelengths of (198)Hg I
1National Institute of Standards and Technology, Gaithersburg, MD 20899.
Summary
This study revisits mercury (Hg I) spectral line optimization, improving energy level accuracy by analyzing wavelength uncertainties. The revised data provides reliable Ritz wavelengths for use as secondary standards across a broad spectral range.
Area of Science:
- Atomic Physics
- Spectroscopy
- Metrology
Background:
- Accurate atomic energy levels are crucial for spectroscopy and metrology.
- Previous optimizations of the mercury (Hg I) spectrum had limitations in accounting for experimental uncertainties.
Purpose of the Study:
- To re-optimize energy levels for the Hg I spectrum by addressing wavelength measurement uncertainties.
- To provide improved and reliable Ritz wavelengths for use as secondary standards.
Main Methods:
- Revisiting the level optimization procedure for the Hg I spectrum.
- Careful analysis and accounting for wavelength uncertainties, buffer gas interactions, and calibration procedures.
- Re-optimizing energy levels based on revised measured wavelengths.
Main Results:
- An improved set of energy level values for Hg I was obtained.
- The re-optimized levels are consistent with revised measured wavelengths.
- New reliable Ritz wavelengths were determined, spanning 1200 Å to 65 000 Å.
Conclusions:
- The revised analysis significantly enhances the accuracy of Hg I energy levels.
- The newly derived Ritz wavelengths serve as valuable secondary standards for spectroscopic applications.
- This work contributes to improved precision in wavelength metrology.
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