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Atomic Spectroscopy Group

The mission of the Atomic Spectroscopy Group is to measure, calculate, critically compile, and disseminate reference data on atomic properties and fundamental constants in support of basic research, commercial development, and national priorities.

The program in atomic spectroscopy at NIST provides accurate reference data on spectral lines and energy levels for a wide variety of important applications. Our spectrometers, among the most powerful of their type in the world, can record spectra from the extreme ultraviolet (wavelength = 1 nm) to the infrared (wavelength = 18 000 nm) and include a 10.7 m normal-incidence spectrograph, a 10.7 m grazing incidence spectrograph, a high resolution Fourier transform spectrometer, and a high accuracy Fabry-Pérot laser wavemeter. 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. Please read Joseph Reader's report on the group's history for more information.

Taking Measure: Just a Standard Blog

Photo of purplish black sky with a streak of bright lightning
Credit: Y. Ralchenko/NIST

In Pursuit of Plasma Power: Hot Stuff, Snowstorms, and Starry Skies. Do we really need hot stuff? I’m not talking about Donna Summer’s disco hit of 1979 or global warming. I’m not talking about anything so lukewarm as the surface of our sun—a mere 6,000 kelvins. I don’t even mean something as hot as 1,000,000 kelvins. No, the kind of hot stuff I’m talking about is closer to an unimaginable 200,000,000 kelvins! What possible use could we have for something so hot?

News and Updates

Spotlight: Gillian Nave and Jacob Ward

STEM is STELLAR! In November 2019, NIST’s Gillian Nave and Jacob Ward brought celebrations of Mercury’s transit (the point where Mercury passes between the

Projects and Programs

Atomic Spectroscopy Data Center

Ongoing
Critical compilations of atomic energy levels, transition wavelengths, and transition probabilities. Online databases.

High Resolution Atomic Spectroscopy

Ongoing
Accurate measurements of atomic wavelengths, energy levels, oscillator strengths and isotope and hyperfine structure using diffraction grating spectrographs

Plasma Metrology

Ongoing
Experimental and computational techniques in support of commercial and scientific uses of plasmas.

Publications

New analysis of Fe VII

Author(s)
Alexander Kramida, A.N. Ryabtsev, Peter R. Young
New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe VII spectrum. As a result, several previously unknown spectral lines

Awards

2015 French Award

The Judson C. French Award, first presented in 2000, is granted for significant improvement in products delivered directly to industry

2009 APS Fellow - Yuri Ralchenko

For significant contributions to the relativistic theory of highly-charged ions and collisional-radiative modeling, and through creation of

Contacts

Group Leader