Modern wavelength standards in the ultraviolet and vacuum ultraviolet

Joseph Reader; Craig J. Sansonetti

doi:10.1117/12.364143

28 September 1999 Modern wavelength standards in the ultraviolet and vacuum ultraviolet

Joseph Reader, Craig J. Sansonetti

Proceedings Volume 3818, Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation II; (1999) https://doi.org/10.1117/12.364143
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

In recent work at the National Institute of Standards and Technology the Atomic Spectroscopy Group has characterized several sources of wavelength standards useful for remote sensing applications. At low resolution, mercury pencil-type lamps are convenient for use either in the laboratory or the field. We recommend wavelengths for this lamp with an uncertainty of +/- 0.001 angstroms in the region 2535 angstroms to 5790 angstroms. We also provide relative irradiances for the most prominent Hg lines, data that can be used to determine instrumental response. For high- resolution applications, we have measured wavelengths and relative intensities emitted by a commercial Pt/Ne hollow cathode lamp. Wavelengths for 5600 lines from 1130 angstroms to 4330 angstroms, some with uncertainties as small as +/- 0.0004 angstroms, are available in a comprehensive atlas of this lamp. Excellent calibration lines can also be obtained from demountable hollow cathode lamps. We review wavelength standards in Fe I and II, Th I and II, Ar II, and Cu II that can be excited in such lamps. Cu II provides wavelengths with uncertainties of less than +/- 0.0004 angstroms from 670 angstroms through the entire ultraviolet region. For calibrations at shorter wavelengths, we have developed accurate standards that can be excited in a sliding-spark discharge with yttrium electrodes.

Citation Download Citation

Joseph Reader and Craig J. Sansonetti "Modern wavelength standards in the ultraviolet and vacuum ultraviolet", Proc. SPIE 3818, Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation II, (28 September 1999); https://doi.org/10.1117/12.364143

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