The spectra of highly ionized W and Re were observed by using laser-produced plasmas and a 3-m grazing-incidence spectrograph. Transitions in Fe- through Zn-like ions were identified. Wavelengths in the range 7–75 Å were measured with an uncertainty of ±0.015 Å, and energy levels were derived from the measured wavelengths. The ionization limits of Cu-like W and Re were determined.
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Intensities based on visual estimates of plate darkening.
Currently measured wavelengths.
Wavelengths measured by Reader and Luther.4
Wavelengths calculated by the present authors using Grant’s program.11,12
Table 2
Wavelengths (in Å) and Classification of Spectral Lines for Co-like W and Re
Intensities based on visual estimates of plate darkening.
Currently measured wavelengths.
Predicted wavelengths of Ekberg et al.14
Calculated wavelengths of Chen.15
Table 3
Wavelengths (in A) and Classification of Spectral Line for Fe-like W and Re
Intensities based on visual estimates of plate darkening.
Currently measured wavelengths.
Previously observed wavelength of Acquista and Reader.5
Wavelengths calculated by the present authors using Grant’s program.11,12
Energy levels based on the present wavelength measurements. The overall uncertainty in the absolute energies of the n = 4 levels is approximately ±1 × 103 cm−1, and the uncertainty in the absolute energies of the n = 5 and n = 6 levels is approximately ±1 × 104 cm−1. The uncertainty in the energy intervals is smaller by a factor of 3.
Energy levels based on the wavelength measurements of Reader and Luther.4
Energy levels calculated by the present authors using Grant’s program.11,12 x, y, and z represent the uncertainty in the fine-structure splitting of the 4p2P1/2 and 2P3/2 levels.
Energy levels based on the present wavelength measurements.
Predicted energy levels of Ekberg et al.14
Calculated levels of Chen.15 x is the uncertainty in the absolute energy levels.
Table 7
Excitation Energy, Binding Energy, and Ionization Limit (in 103 cm−1) for Cu-like W and Re
The observed excitation energy.
The binding energy calculated using Grant’s program.11,12
The ionization limit I = E + T. The adopted ionization limit for W45+ is 19 471.1 ± 2.9 units of 103 cm−1.
The ionization limit I = E + T. The adopted ionization limit for Re46+ is 20 281.1 ± 2.2 in units of 103 cm−1.
Tables (7)
Table 1
Wavelengths (in Å) and Classification of Spectral Lines for Cu-like W and Re
Intensities based on visual estimates of plate darkening.
Currently measured wavelengths.
Wavelengths measured by Reader and Luther.4
Wavelengths calculated by the present authors using Grant’s program.11,12
Table 2
Wavelengths (in Å) and Classification of Spectral Lines for Co-like W and Re
Intensities based on visual estimates of plate darkening.
Currently measured wavelengths.
Predicted wavelengths of Ekberg et al.14
Calculated wavelengths of Chen.15
Table 3
Wavelengths (in A) and Classification of Spectral Line for Fe-like W and Re
Intensities based on visual estimates of plate darkening.
Currently measured wavelengths.
Previously observed wavelength of Acquista and Reader.5
Wavelengths calculated by the present authors using Grant’s program.11,12
Energy levels based on the present wavelength measurements. The overall uncertainty in the absolute energies of the n = 4 levels is approximately ±1 × 103 cm−1, and the uncertainty in the absolute energies of the n = 5 and n = 6 levels is approximately ±1 × 104 cm−1. The uncertainty in the energy intervals is smaller by a factor of 3.
Energy levels based on the wavelength measurements of Reader and Luther.4
Energy levels calculated by the present authors using Grant’s program.11,12 x, y, and z represent the uncertainty in the fine-structure splitting of the 4p2P1/2 and 2P3/2 levels.
Energy levels based on the present wavelength measurements.
Predicted energy levels of Ekberg et al.14
Calculated levels of Chen.15 x is the uncertainty in the absolute energy levels.
Table 7
Excitation Energy, Binding Energy, and Ionization Limit (in 103 cm−1) for Cu-like W and Re
The observed excitation energy.
The binding energy calculated using Grant’s program.11,12
The ionization limit I = E + T. The adopted ionization limit for W45+ is 19 471.1 ± 2.9 units of 103 cm−1.
The ionization limit I = E + T. The adopted ionization limit for Re46+ is 20 281.1 ± 2.2 in units of 103 cm−1.
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