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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 71, Iss. 3 — Mar. 1, 1981
  • pp: 231–237

3p6 3d8-3p5 3d9 transitions in Sr XIII, Y XIV, Zr XV, Nb XVI, and Mo XVII

Joseph Reader and Aleksandr Ryabtsev  »View Author Affiliations


JOSA, Vol. 71, Issue 3, pp. 231-237 (1981)
http://dx.doi.org/10.1364/JOSA.71.000231


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Abstract

The 3p6 3d8–3p5 3d9 transitions in Sr XIII, Y XIV, Zr XVI, Nb XVI, and Mo XVII have been newly measured by means of a low-inductance vacuum spark and a 10.7-m grazing-incidence spectrograph. The measurements have led to an improved analysis of this complex transition group in these ions. All levels of the combining configurations have been established. The energy parameters determined from least-squares fits to the observed levels are compared with Hartree-Fock calculations. The effective interaction αL(L + 1) for the 3p6 3d8 configuration decreases markedly with increasing ionization. The effective electrostatic interactions D1(3p3d) and X2(3p3d) for the 3p5 3d9 configuration are practically constant through the sequence.

Citation
Joseph Reader and Aleksandr Ryabtsev, "3p6 3d8-3p5 3d9 transitions in Sr XIII, Y XIV, Zr XV, Nb XVI, and Mo XVII," J. Opt. Soc. Am. 71, 231-237 (1981)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-71-3-231


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References

  1. M. W. D. Mansfield et al., "The XUV spectra of highly ionized molybdenum," J. Phys. B 11, 1521–1544 (1978).
  2. M. I. Bogdanovichene et al., "3d8–3p5 3d9 transitions in spectra of Y XIV-Mo XVII," Opt. Spektrosk. 49, 447–452 (1980).
  3. P. G. Burkhalter, J. Reader, and R. D. Cowan, "Spectra of Mo XIII–XVIII from a laser-produced plasma and a low-inductance vacuum spark," J. Opt. Soc. Am. 70, 912–919 (1980).
  4. J. Reader and N. Acquista, "4s–4p resonance transitions in highly charged Cu- and Zn-like ions," Phys. Rev. Lett. 39, 184–187 (1977).
  5. J. Reader, G. Luther, and N. Acquista, "Spectrum and energy levels of thirteen-times ionized molybdenum (Mo XIV)," J. Opt. Soc. Am. 69, 144–149 (1979).
  6. J. Reader and N. Acquista, "Spectrum and energy levels of tentimes ionized yttrium (Y XI)," J. Opt. Soc. Am. 69, 1285–1288 (1979).
  7. J. Reader and N. Acquista, "Spectrum and energy levels of eleven-times ionized zirconium (Zr XII)," J. Opt. Soc. Am. 69, 1659–1662 (1979).
  8. J. Reader and N. Acquista, "Spectrum and energy levels of twelve-times ionized niobium (Nb XIII)," J. Opt. Soc. Am. 70, 317–321 (1980).
  9. C. Froese, "Numerical solution of the Hartree-Fock equations," Can. J. Phys. 41, 1895–1910 (1963); C. Froese-Fischer and M. Wilson, "Programs for atomic structure calculations," Argonne National Laboratory Report No. 7404 (National Technical Information Service, Springfield, Va., 1968).
  10. Optimization of the level values was done with the computer program ELCALCpr ogrammed by L. J. Radziemski, Jr.
  11. L. I. Podobedova, A. A. Ramonas, and A. N. Ryabtsev, "Analysis of the spectrum of Ge VII," Opt. Spektrosk. 49, 453–459 (1980).
  12. E. Meinders, "Revised analysis of the Cu Iv spectrum," Physica (Utrecht) 84C, 117–132 (1976).
  13. This notation for the effective electrostatic interactions is that given by J. Sugar and V. Kaufman, "Fourth spectrum of lutetium," J. Opt. Soc. Am.62, 562–570 (1972). In our energy matrix the coefficients of D1 (3p3d) are [5]½/10 for1,3P, [5]½/30 for 1,3D, and -[5]½/15 for 1,3F; the coefficients of X2(3p3d) are 1/10 for 1P, - 1/10 for 3P, -1/6 for 1D, 1/6 for 3D, -1/15 for 1F; and 1/15 for 3F.

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