OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 1, Iss. 2 — Apr. 1, 1984
  • pp: 239–245

Multichannel-quantum-defect theory wave functions of Ba tested or improved by laser measurements

M. Aymar  »View Author Affiliations


JOSA B, Vol. 1, Issue 2, pp. 239-245 (1984)
http://dx.doi.org/10.1364/JOSAB.1.000239


View Full Text Article

Acrobat PDF (974 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Considerable efforts have been made recently to understand the detailed structure and properties of high Rydberg states of the bound even-parity spectrum of Ba. Interest in Ba is motived by the ability to study interacting Rydberg series. The perturbations of 6snl Rydberg series by 5d7d levels are reflected not only in the level structure but also in various observable quantities recently investigated by high-resolution laser spectroscopy. A wealth of data has been obtained on lifetimes, isotopes shifts, Landé factors, hyperfine structures, photoelectron angular distributions, etc. Previously the multichannel-quantum-defect theory (MQDT) has permitted one successfully to interpret the energies of perturbed series. The new possibilities offered by laser spectroscopy to analyze state mixing have provided an opportunity to probe the MQDT wave functions. This paper shows how the data provided by different measurements complement one another to check or even extend the MQDT models derived from energies. Various examples concerning the perturbed 6sns and 6snd Rydberg series are presented. For the 6snd 1,3D2 series, energies are insufficient to get the full MQDT parameters needed to determine the wave functions, and gj-factor and hyperfine-structure measurements have been essential to improve MQDT wave functions.

© 1984 Optical Society of America

Citation
M. Aymar, "Multichannel-quantum-defect theory wave functions of Ba tested or improved by laser measurements," J. Opt. Soc. Am. B 1, 239-245 (1984)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-1-2-239


Sort:  Author  |  Year  |  Journal  |  Reset

References

  1. M. Aymar, P. Camus, M. Dieulin, and C. Morillon, "Two-photon spectroscopy of neutral barium: observations of the highly excited even levels and theoretical analysis of the J = 0 spectrum," Phys. Rev. A 18, 2173–2183 (1978).
  2. P. Camus, M. Dieulin, and A. El Himdy, "Two-step optogalvanic spectroscopy of neutral barium: observations and interpretation of the even levels below the 6s ionization limit with J = 1,3,4 and 5," Phys. Rev. A 26, 379–390 (1982).
  3. M. J. Seaton, "Quantum defect theory. I—General formulation," Proc. Phys. Soc. 88, 801–814 (1966).
  4. M. J. Seaton, "Quantum defect theory," Rep. Prog. Phys. 46, 167–257 (1983).
  5. K. T. Lu, "Spectroscopy and collision theory. The Xe absorption spectrum," Phys. Rev. A 4, 579–596 (1971).
  6. C. M. Lee and K. T. Lu, "Spectroscopy and collision theory. II—The Ar absorption spectrum," Phys. Rev. A 8, 1241–1257 (1973).
  7. U. Fano, "Unified treatment of perturbed series, continuous spectra, and collisions," J. Opt. Soc. Am. 65, 979–987 (1975), and references therein.
  8. M. Aymar and O. Robaux, "Multichannel quantum-defect analysis of the bound even-parity J = 2 spectrum of neutral barium," J. Phys. B 12, 531–546 (1979).
  9. M. Aymar and P. Camus, "Multichannel quantum-defect analysis of the bound even-parity spectrum of neutral barium," Phys. Rev. A 28, 850–857 (1983).
  10. M. Aymar, "Rydberg series of alkaline-earth atoms Ca through Ba. The interplay of laser spectroscopy and multichannel quantum defect analysis," Phys. Rep. (to be published).
  11. M. Aymar, R. J. Champeau, C. Delsart, and J. C. Keller, "Life-times of Rydberg levels in the perturbed 6snd 1,3D2 series of barium I," J. Phys. B 14, 4489–4496 (1981).
  12. T. F. Gallagher, W. Sandner, and K. A. Safinya, "Probing configuration interaction of the Ba 5d7d 1D2 state using radio-frequency spectroscopy and lifetime measurements," Phys. Rev. A 23, 2969–2977 (1981).
  13. K. Bathia, P. Grafström, C. Levinson, H. Lundberg, L. Nilsson, and S. Svanberg, "Natural radiative lifetimes in the perturbed 6snd D2 sequence of barium," Z. Phys. A 303, 1–5 (1981).
  14. M. Aymar, P. Grafström, C. Levinson, H. Lundberg, and S. Svanberg, "Perturbation of Ba 6sns 1S0 sequence by the 5d7d 3P0 state, probed by lifetime measurements". J. Phys. B 15, 877–882 (1982).
  15. P. Grafström, C. Levinson, H. Lundberg, S. Svanberg, P. Grun-devik, L. Nilsson, and M. Aymar, "Zeeman effect in the perturbed 6snd 1,3D2 sequences of Ba I; test of MQDT wave functions," Z. Phys. A 308, 95–101 (1982).
  16. P. Grafström, J. Zhan-Kui, G. Jönsson, S. Kröll, C. Levinson, H. Lundberg, and S. Svanberg, "Hyperfine structure and isotope shift of highly excited barium-l states," Z. Phys. A 306, 281–284 (1982).
  17. J. Neukammer, E. Matthias, and H. Rinneberg, "Systematic investigation of electron densities at the nucleus for Rydberg states of barium," Phys. Rev. A 25, 2426–2429 (1982).
  18. H. Rinneberg, J. Neukammer, and E. Matthias, "Isotope shifts of perturbed 6sns 1S0 and 3S Rydberg states of odd barium isotopes," Z. Phys. A 306, 11–18 (1982).
  19. J. Neukammer and H. Rinneberg, "Hyperfine structure of perturbed 6sns 3S1 Rydberg states of Ba," J. Phys. B 15, L425–L429 (1982).
  20. H. Rinneberg and J. Neukammer, "Resonance in singlet-triplet mixing in two-electrons systems caused by perturbing configurations," Phys. Rev. Lett. 49, 124–127 (1982).
  21. H. Rinneberg and J. Neukammer, "Hyperfine structure and three-channel quantum defect theory of 6snd 1D2 Rydberg states of Ba," Phys. Rev. A 27, 1779–1789 (1983).
  22. H. Rinneberg and J. Neukammer, "Hyperfine structure and configuration interaction of the 5dld 1D2 perturbing state of barium," J. Phys. B 15, L825–L829 (1982).
  23. W. Hogervorst and E. R. Eliel, "High resolution spectroscopy on 6sns Rydberg states of Ba," Z. Phys. A 310, 19–26 (1983).
  24. R. E. Eliel and W. Hogervorst, "Hyperfine structure in 6snd Rydberg configuration in barium," J. Phys. B 16, 1881–1893 (1983).
  25. E. Matthias, P. Zoller, D. S. Elliott, N. D. Piltch, S. J. Smith, and G. Leuchs, "Influence of configuration mixing in intermediate states on resonant multiphoton ionization," Phys. Rev. Lett. 50, 1914–1917 (1983), and references therein.
  26. K. A. H. van Leeuwen, W. Hogervorst, and B. H. Post, "Stark effect in barium 6snd 1D2 Rydberg states; evidence of strong perturbations in the 1F3 series," Phys. Rev. A 28, 1901–1908 (1983).
  27. R. J. Fonck, F. L. Roesler, D. H. Tracy, K. T. Lu, F. S. Tomkins, and W. R. S. Garton, "Atomic diagmagnetism and diamagneti-cally induced configuration mixing in laser-excited barium," Phys. Rev. Lett. 39, 1513–1516 (1977).
  28. O. Robaux and M. Aymar, "A program for analyzing the Rydberg series of highly excited discrete spectra by MQDT," Comp. Phys. Commun. 25, 223–236 (1982).
  29. J. A. Armstrong, P. Esherick, and J. J. Wynne, "Bound even parity J = 0 and J = 2 spectra of Ca; a multichannel quantum-defect theory analysis," Phys. Rev. A 15, 180–196 (1977).
  30. P. Esherick, "Bound, even-parity J = 0 and J = 2 spectra of Sr," Phys. Rev. A 15, 1920–1936 (1977).
  31. J. A. Armstrong, J. J. Wynne, and P. Esherick, "Bound, odd-parity J = 1 spectra of the alkaline earths: Ca, Sr, and Ba," J. Opt. Soc. Am. 69, 211–230 (1979).
  32. J. J. Wynne, J. A. Armstrong, and P. Esherick, "Zeeman effect of J = 2 states of Sr: g factor variation for interacting Rydberg series," Phys. Rev. Lett. 39, 1520–1523 (1977).
  33. R. Beigang, E. Matthias, and A. Timmermann, "Influence of singlet-triplet mixing on the hyperfine structure of 5snd Rydberg states in 87Sr," Phys. Rev. Lett. 47, 326–329 (1981); 48, 290 (1982).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited