Cu II spectral lines and their suitability as wavelength standards in the vacuum ultraviolet
- 1 September 1977
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 10 (9) , 894-897
- https://doi.org/10.1088/0022-3735/10/9/014
Abstract
Thirty of the more intense Cu II vacuum ultraviolet lines from a liquid-nitrogen-cooled hollow-cathode lamp have been studied to determine which are sufficiently narrow and symmetrical for use as wavelength standards. The wavelength shift and width variations caused by changes in the helium gas pressure and the discharge current have been measured for four of the lines. It is concluded that many of the lines could be used as wavelength standards with an accuracy of +or-0.01 pm (0.1 mAA) if the current is kept between 200 and 300 mA and the helium pressure between 400 and 800 Pa (3-6 Torr).Keywords
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