The wavelengths of 19 spectral lines in the region 253–579 nm emitted by Hg pencil-type lamps were measured by Fourier-transform spectroscopy. Precise calibration of the spectra was obtained with wavelengths of 198Hg as external standards. Our recommended values should be useful as wavelength-calibration standards for moderate-resolution spectrometers at an uncertainty level of 0.0001 nm.
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Intensities are relative values based on irradiance values from Ref. 1 with the intensity of 436 nm set arbitrarily to 10,000.
The wavelength uncertainty is 0.0001 nm, with the exception of that of the 434.7506-nm line (see text).
Table 3
Comparison of 198Hg Wavelengths Derived from Our High-Resolution Fourier-Transform Spectrum of a Natural-Hg Electrodeless Lamp with the Results Obtained by Kaufmana
Ref. 4.
Derived from the fully resolved, hyperfine-structure components of 199Hg by use of intervals measured by Blaise and Chantrel.6
Calculated from the optimized energy levels for 198Hg in a lamp with a pressure of 400 Pa (3 Torr) Ar.4
Tables (3)
Table 1
Results of the Individual Measurements for Hg Pencil-Type Lamps
Line(nm)
Lamp 1
Lamp 2
Lamp 3
Measurement 1
Measurement 2
Measurement 1
Measurement 2
Measurement 3
Measurement 4
Measurement 1
Measurement 2
Measurement 3
253
.6523
.6520
.6522
.6520
289
.3600
.3601
.3600
.3603
296
.7282
.7283
.7283
.7283
302
.1503
.1505
.1505
.1504
312
.5674
.5674
.5674
.5674
313
.1555
.1554
.1554
.1554
313
.1844
.1844
.1844
.1844
334
.1485
.1482
.1484
.1484
365
.0158
.0159
.0159
.0158
365
.4842
.4842
.4843
.4842
366
.2886
.2888
.2888
.2888
366
.3284
.3285
.3284
.3283
404
.6564
.6565
.6565
.6565
.6565
.6565
.6565
.6565
.6565
407
.7837
.7837
.7837
.7837
.7836
.7837
.7836
.7837
.7836
434
.7505
.7505
.7504
.7510
.7510
435
.8334
.8334
.8335
.8335
.8334
.8335
.8334
.8335
.8334
546
.0749
.0750
.0750
.0750
.0750
576
.9610
.9610
.9611
.9609
.9609
579
.0670
.0670
.0671
.0671
.0670
Table 2
Recommended Wavelengths (Air) and Wave Numbers (Vacuum) for Selected Hg Spectral Lines Emitted by Pencil-Type Lamps
Intensities are relative values based on irradiance values from Ref. 1 with the intensity of 436 nm set arbitrarily to 10,000.
The wavelength uncertainty is 0.0001 nm, with the exception of that of the 434.7506-nm line (see text).
Table 3
Comparison of 198Hg Wavelengths Derived from Our High-Resolution Fourier-Transform Spectrum of a Natural-Hg Electrodeless Lamp with the Results Obtained by Kaufmana
Ref. 4.
Derived from the fully resolved, hyperfine-structure components of 199Hg by use of intervals measured by Blaise and Chantrel.6
Calculated from the optimized energy levels for 198Hg in a lamp with a pressure of 400 Pa (3 Torr) Ar.4
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