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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 60, Iss. 7 — Jul. 1, 1970
  • pp: 889–891

Ionization Potential of Boron, and the Isotopic and Fine Structure of 2s2p22D

B. EDLÉN, A. ÖLME, G. HERZBERG, and J. W. C. JOHNS  »View Author Affiliations

JOSA, Vol. 60, Issue 7, pp. 889-891 (1970)

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The <i>n</i>ƒ <sup>2</sup><i>F</i> series (<i>n</i>=4-11) of B I is found from combinations with 3<i>d</i> <sup>2</sup><i>D</i> and 2<i>s</i>2<i>p</i><sup>2</sup> <sup>2</sup><i>D</i>, and the series limit is derived by means of a Ritz formula, yielding an ionization potential of 66 928.10±0.1 cm<sup>-1</sup>. The same value applies to both <sup>10</sup>B and <sup>11</sup>B because the isotope shift of the ground state is shown to be zero. From the resolved structure of the transition 2<i>s</i>2<i>p</i><sup>2</sup> <sup>2</sup><i>D</i>-4ƒ<sup>2</sup><i>F</i> at 8212 Å, we derive for 2<i>s</i>2<i>p</i><sup>2</sup> <sub>2</sub><i>D</i> a fine-structure interval of -0.31 cm<sup>-1</sup> and an isotope shift of -0.58 cm<sup>-1</sup>, corresponding to a specific mass shift of -0.67 cm<sup>-1</sup>.

© 1970 Optical Society of America

B. EDLÉN, A. ÖLME, G. HERZBERG, and J. W. C. JOHNS, "Ionization Potential of Boron, and the Isotopic and Fine Structure of 2s2p22D," J. Opt. Soc. Am. 60, 889-891 (1970)

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  1. N. G. Whitelaw and J. E. Mack, Phys. Rev. 47, 677 (1935).
  2. For a description of the instrument, see K. B. S. Eriksson and I. Wenåker, Physica Scripta 1, 21 (1970).
  3. N. E. Wagman, Bull. Univ. Pittsburgh 34, 1, 9 (1937).
  4. See, e.g., W. Opechowski and D. A. de Vries, Physica 6, 913 (1939).
  5. E. W. Burke, Jr., Phys. Rev. 99, 1839 (1955). He gives -0.137±0.012 cm-1 for 2496.8 Å and -0.139±0.006 cm-1 for 2497.7 Å.
  6. S. H. Bauer, G. Herzberg, and J. W. C. Johns, J. Mol. Spectrosc. 13, 256 (1964).
  7. J. W. C. Johns, F. A. Grimm, and R. F. Porter, J. Mol. Spectrosc. 22, 435 (1967).
  8. G. Herzberg and J. W. C. Johns, Proc. Roy. Soc. (London) 298A, 142 (1967).
  9. H. E. Clearman, J. Opt. Soc. Am. 42, 373 (1952).
  10. See, for instance, H. Lew and R. S. Title, Can. J. Phys. 38, 868 (1960), and A. Hese and H.-P. Weise, Z. Physik 215, 95 (1968).

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