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Proceedings Paper

Atomic spectroscopy at NIST: 2001
Author(s): Joseph Reader
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Paper Abstract

The program in atomic spectroscopy at NISt continues to provide accurate reference data on spectral lines and energy levels for a wide variety of important applications. With spectrometers that can record spectra from the extreme ultraviolet (1 nm) to the infrared (18 000 nm), we can measure spectra over a large spectral range. Most of these spectrometers are the most powerful of their type in the world. We recently used out 10.7-m normal-incidence vacuum spectrography to make precision measurements of the wavelengths of lasing lines in a commercial molecular fluorine laser at 157 nm. These results establish standard values to be applied in the design of optics for microlithography at this wavelength. Our high resolution Fourier transform spectrometer is being used to measure wavelengths and transition probabilities for rare-earth atoms and ions th at are used as additives in the production of high intensity discharge lamps. The data allow lamp designers to model the processes occurring in the discharge. Our 10.7-m grazing incidence spectrograph is being used to obtain data for diagnostics of magnetic fusion research plasmas as well as for astronomical applications such as the Chandra X-ray Observatory. Precision laser spectroscopy on neutral Li is being carried out to test the validity of quantum electrodymanics (QED) calculations. Finally, we are continuing to carry out critical complications of wavelengths, energy levels, and transition probabilities and to improve our Atomic Spectra Database on the World Wide Web. These data activities support many applications throughout industry and the scientific community.

Paper Details

Date Published: 18 June 2001
PDF: 13 pages
Proc. SPIE 4450, Harnessing Light: Optical Science and Metrology at NIST, (18 June 2001); doi: 10.1117/12.431246
Show Author Affiliations
Joseph Reader, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 4450:
Harnessing Light: Optical Science and Metrology at NIST
Carmina Londono, Editor(s)

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