Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

High Resolution Atomic Spectroscopy


Accurate measurements of atomic wavelengths, energy levels, oscillator strengths and isotope and hyperfine structure using diffraction grating spectrographs, Fourier transform spectrometers.


Fourier transform spectrometer

For many decades, the Atomic Spectroscopy Group at NIST has measured atomic data of vital use to astronomy and other fields using high resolution spectrometers that are found in few other places in the world. These include a 2-m path difference Fourier transfer (FT)spectrometer, a vacuum ultraviolet FT spectrometer, a 10.7-m normal incidence spectrometer, a 10.7-m normal incidence spectrograph and a 10-m grazing incident spectrograph.

Recent work has focused around two main themes: the measurement of wavelength calibration standards for astronomical telescopes, and the measurement and analysis of wavelengths and energy levels of iron-group element.

Major Accomplishments

Grating Spectroscopy

Several High-Resolution Instruments, including:
10.7 m Normal Incidence Spectrograph
10.7 m Grazing Incidence Spectrograph
Czerny-Turner Spectrograph
For technical questions contact:
email: jacob.ward [at] (jacob[dot]ward[at]nist[dot]gov)

Fourier Transform Spectrometers

2-m infrared/visible/UV Fourier transform spectrometer
vacuum ultraviolet Fourier transform spectrometer
For technical questions contact:
email: jacob.ward [at] (jacob[dot]ward[at]nist[dot]gov)

Created February 23, 2010, Updated June 7, 2024