U. Feldman,1
J. F. Seely,1
C. M. Brown,1
J. O. Ekberg,1
M. C. Richardson,2
W. E. Behring,3
and Joseph Reader4
1E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington D.C. 20375-5000 USA
2Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 USA
3Laboratory for Solar Physics and Astrophysics, Goddard Space Flight Center, Greenbelt, Maryland 20771 USA
4National Bureau of Standards, Gaithersburg, Maryland 20899 USA
J. O. Ekberg is also with Sachs/Freeman Associates, Landover, Maryland 20785. Permanent address, Department of Physics, University of Lund, Lund, Sweden.
U. Feldman, J. F. Seely, C. M. Brown, J. O. Ekberg, M. C. Richardson, W. E. Behring, and Joseph Reader, "Spectra and energy levels of Br xxv, Br xxix, Br xxx, and Br xxxi," J. Opt. Soc. Am. B 3, 1605-1608 (1986)
Emission lines of highly ionized bromine in the wavelength region 17–93 Å have been identified in spectra recorded at the University of Rochester’s OMEGA laser facility. The wavelengths of 2s–2p transitions in nitrogenlike Br xxix, carbonlike Br xxx, and boronlike Br xxxi are presented. The wavelengths of the magnetic dipole transitions within the 2s22p3 ground configurations of Br xxix are predicted from the experimental energy levels. Transitions from the n = 4 and 5 levels of sodiumlike Br xxv were also identified, and the ionization energy of Br xxv was determined to be 9 027 600 ± 2000 cm−1 (1119.3 ± 0.2 eV).
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Predicted wavelengths from Edlén.10–12
Blended with the Br xxv transition.
Blended with the Br xxviii transition.
Blended Br xxix and Br xxx transitions.
Table 2
Energy Levels (in cm−1) for Br xxix, Br xxx, and Br xxxi
Core polarization energy from Edlén.17
Relativistic hydrogenic term value.
Calculated term value T = Δp + TH.
Experimentally determined excitation energy.
Limit El = Δp + TH + E. The adopted ionization energy is 9 027 600 ± 2000 cm−1.
Tables (6)
Table 1
Wavelengths (in angstroms) and Classifications of Spectral Lines in Br xxix, BR xxx, and Br xxxi
Predicted wavelengths from Edlén.10–12
Blended with the Br xxv transition.
Blended with the Br xxviii transition.
Blended Br xxix and Br xxx transitions.
Table 2
Energy Levels (in cm−1) for Br xxix, Br xxx, and Br xxxi
Core polarization energy from Edlén.17
Relativistic hydrogenic term value.
Calculated term value T = Δp + TH.
Experimentally determined excitation energy.
Limit El = Δp + TH + E. The adopted ionization energy is 9 027 600 ± 2000 cm−1.