The Atomic Spectroscopy Group at NIST focuses on measuring, calculating, and disseminating reference data on atomic properties and fundamental constants. This data supports basic research, commercial development, and national priorities. The group’s capabilities include state-of-the-art spectrometers that can record spectra from hard x-ray wavelengths to infrared wavelengths, as well as high-resolution Fourier transform spectrometers and Fabry-Pérot laser wavemeters. The Data Center compiles wavelengths, energy levels, and transition probabilities that support numerous applications in industry and the scientific community. The Atomic Spectroscopy Group at NIST has a long history of contributions to optical science and metrology, advancing the field and supporting various applications.
Source: https://www.nist.gov/pml/quantum-measurement/atomic-spectroscopy
Keywords: Atomic Spectroscopy, Spectral Lines, Energy Levels