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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 9, Iss. 2 — Feb. 1, 1992
  • pp: 191–196

Use of atomic-beam laser radio-frequency double resonance for interpretation of complex spectra: Tb I as a test case

W. J. Childs  »View Author Affiliations


JOSA B, Vol. 9, Issue 2, pp. 191-196 (1992)
http://dx.doi.org/10.1364/JOSAB.9.000191


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Abstract

The usefulness of the atomic-beam laser-rf double-resonance technique as an aid in the interpretation of complex optical spectra is investigated. A 2-Å-wide region (centered on 5441 Å) in the spectrum of Tb I is selected for the test. Some 25 atomic lines, many with severely overlapping hyperfine structure (hfs) patterns, had been observed in the region, and only a few of these had been successfully classified. The procedure followed for each line was to measure the hfs intervals of the lower level precisely and then to compare them with the known intervals of previously designated low levels. The procedure leads to a successful identification for only about half of the levels studied, owing principally to the small size of the ensemble of levels with known splittings. The method does have advantages, however, and is shown to be a useful supplement to conventional spectroscopic techniques. A number of new line classifications, level designations, and hfs intervals are reported.

© 1992 Optical Society of America

Citation
W. J. Childs, "Use of atomic-beam laser radio-frequency double resonance for interpretation of complex spectra: Tb I as a test case," J. Opt. Soc. Am. B 9, 191-196 (1992)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-9-2-191


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References

  1. For the (4f-shell) rare-earth elements, the energy levels identified from these studies are summarized in Atomic Energy Levels, the Rare-Earth Elements, National Bureau of Standards Reference Data Service Circ. No. 60, W. C. Martin, R. Zalubas, and L. Hagan eds. (U.S. GPO, Washington, D.C., 1978).
  2. See, for example, W. J. Childs and L. S. Goodman, "Double-resonance, fluorescence spectroscopy, and hyperfine structure in Pr I," Phys. Rev. A 24, 1342–1349 (1981).
  3. J. Blaise, in Gmelin Handbuch der Anorganischen Chemie, Seltenerdelemente, G. Kirschstein, ed. (Springer-Verlag, Berlin, 1976), Teil B4, pp. 242–255.
  4. Most of the levels identified in this work are listed in Refs. 1 and 3. The original work was performed by many people. Especially important is a series of six papers by Klinkenberg and co-workers; they are referred to as Refs. 4(a)–4(f). (a) P. F. A. Klinkenberg, "Structure of the spectrum of neutral terbium, Tb I," Physica (Utrecht) 32, 1113–1147 (1966); (b) P. F. A. Klinkenberg and E. Meinders, "Structure of the spectrum of neutral terbium, Tb I, part II," Physica (Utrecht) 32, 1617–1632 (1966); (c) P. F. A. Klinkenberg, "Structure of the spectrum of neutral terbium, Tb I, part III," Physica (Utrecht) 37, 197–214 (1967); (d) E. Meinders and P. F. A. Klinkenberg, "Structure of the spectrum of neutral terbium, Tb I, part IV," Physica (Utrecht) 38, 253–274 (1968); (e) P. F. A. Klinkenberg and E. Meinders, "Structure of the spectrum of neutral terbium, Tb I, part V," Physica (Utrecht) 42, 213–241 (1969); (f) P. F. A. Klinkenberg, "Structure of the spectrum of neutral terbium, Tb I, part VI," Physica (Utrecht) 57, 594–615 (1972).
  5. W. J. Childs, "Hyperfine structure of many atomic levels of 159Tb and the 159Tb nuclear electric-quadrupole moment," Phys. Rev. A 2, 316–336 (1970).
  6. W. J. Childs and L. S. Goodman, "Assignment of unclassified lines in Tb I through high-resolution laser fluorescence measurements of hyperfine structure," J. Opt. Soc. Am. 69, 815–819 (1979).
  7. W. J. Childs, H. Crosswhite, L. S. Goodman, and V. Pfeufer, "Hyperfine structure of 4fN6s2 configurations in 159Tb, 161,163Dy, and 169Tm," J. Opt. Soc. Am. B 1, 22–29 (1984).
  8. See in particular C. Bauche-Arnoult, J. Sinzelle, and A. Bachelier, "Extensive theoretical analysis of the f6d and f8d configurations. Application to 4f85d6s2 in Tb I," J. Opt. Soc. Am. 68, 368–374 (1978), and references therein.
  9. P. F. A. Klinkenberg, Zeeman Laboratorium, Amsterdam, The Netherlands (personal communication, 1984).
  10. W. J. Childs, O. Poulsen, and L. S. Goodman, "Laser-rf double-resonance spectroscopy in the samarium I spectrum: hyperfine structures and isotope shifts," Phys. Rev. A 19, 160–167 (1979).
  11. S. Gerstenkorn and P. Luc, Atlas du spectre d'absorption de la molecule d'iode, 14 000 cm−1–15 600 cm−1 (Editions du Centre National de la Recherche Scientifique, Paris, France, 1978); S. Gerstenkorn and P. Luc, Rev. Phys. Appl. 14, 791 (1979).
  12. The theory is summarized in many places. See, for example, W. J. Childs, "Hyperfine and Zeeman studies of metastable atomic states by atomic-beam magnetic resonance," Case Stud. At. Phys. 3, 215–304 (1973).
  13. P. F. A. Klinkenberg, Zeeman Laboratorium, Amsterdam, The Netherlands (personal communication, 1989).

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