Wavelengths of the 3d6(5D)4s a6D-3d5(6S)4s4p y6P multiplet of Fe II (UV 8)

被引：25
|
作者：
Nave, Gillian [1 ]
Sansonetti, Craig J. [1 ]
机构：
[1] NIST, Gaithersburg, MD 20899 USA
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2011年 / 28卷 / 04期
基金：
美国国家航空航天局;
关键词：
FOURIER-TRANSFORM SPECTROMETER; FINE-STRUCTURE CONSTANT; VACUUM-ULTRAVIOLET; ENERGY-LEVELS; CALIBRATION; SPECTRUM; LINE; TRANSITIONS; ANGSTROM; REGION;
D O I：
10.1364/JOSAB.28.000737
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Weinvestigate the wavenumber scale of Fe I and Fe II lines using new spectra recorded with Fourier transform-spectroscopy and a reanalysis of archival spectra. We find that standards in Ar II, Mg I, Mg II, and Ge I give a consistent wavenumber calibration. We use the recalibrated spectra to derive accurate wavelengths for the a(6)D - y(6)P multiplet of Fe II (UV 8) using both directly measured lines and Ritz wavelengths. Lines from this multiplet are important for astronomical tests of the invariance of the fine-structure constant on a cosmological time scale. We recommend a wavelength of 1608.45081 angstrom with one standard deviation uncertainty of 0.00007 angstrom for the a(6)D(9/2) - y(6)P(7/2) transition.
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页码：737 / 745
页数：9
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