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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 69, Iss. 12 — Dec. 1, 1979
  • pp: 1659–1662

Spectrum and energy levels of eleven-times ionized zirconium (Zr XII)

Joseph Reader and Nicolo Acquista  »View Author Affiliations


JOSA, Vol. 69, Issue 12, pp. 1659-1662 (1979)
http://dx.doi.org/10.1364/JOSA.69.001659


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Abstract

The spectrum of Zr XII was observed with a low-inductance spark and a laser-produced plasma in the region from 70 to 630 Å on the 10.7-m grazing incidence spectrograph at NBS. From the identification of 36 lines, a system of 28 energy levels was determined. The level system (Cu I isoelectronic sequence, 3d10nl) includes the series np (n = 4-6), nd (n = 4-6), nƒ (n = 4-8), and ng (n = 5-7). The 4ƒ 2F term has an anomalously small fine-structure interval (1 ±3 cm-1). The ionization energy is determined from the ng series (n = 5-7) to be 1 905 500 ± 200 cm-1 (236.25 ± 0.03 eV).

Citation
Joseph Reader and Nicolo Acquista, "Spectrum and energy levels of eleven-times ionized zirconium (Zr XII)," J. Opt. Soc. Am. 69, 1659-1662 (1979)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-69-12-1659


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References

  1. E. Alexander, M. Even-Zohar, B. S. Fraenkel, and S. Goldsmith, "Classification of transitions in the euv spectra of Y IX–XIII, Zr X–XIV, Nb XI–XV, and Mo XII–XVI," J. Opt. Soc. Am. 61, 508–514(1971)
  2. J. Reader and N. Acquista, "4s-4p resonance transitions in highly charged Cu- and Zn-like ions," Phys. Rev. Lett. 39, 184–187 (1977).
  3. J. Reader and N. Acquista, "Spectrum and energy levels of ten-times ionized yttrium (Y XI)," J. Opt. Soc. Am. 69, 1285– (1979).
  4. J. Reader, G. Luther, and N. Acquista, "Spectrum and energy levels of thirteen-times ionized molybdenum (Mo XIV)," J. Opt. Soc. Am. 69, 144– (1979).
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  8. J. Reader and N. Acquista, "Spectrum and energy levels of four-times ionized zirconium (Zr V)," J. Opt. Soc. Am. 69, 239–253 (1979).
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  11. Optimization of the level values was done with the computer program ELCALC, due to L. Radziemski, Jr.
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