Abstract

The spectrum of selenium has been observed in the wavelength region 1200–100 Å on the 10.7 m normal incidence and 10.7 m grazing incidence vacuum spectrographs at the NBS Laboratory in Washington. A triggered vacuum spark was used as a source. The “pole effect” exhibited by the lines on the normal incidence spectrograms helped to discriminate different stages of ionization of the selenium spectra. All the levels belonging to the 3d<sup>9</sup>4s and 3d<sup>9</sup>4p configurations in Se VII have been located. The parametric level fitting calculations of the energy levels agree with the experimental values. In Se VIII, the 3p<sup>5</sup>3d<sup>10</sup><sup>2</sup>P° term has been determined.

© 1977 Optical Society of America

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  1. P. G. Kruger and W. E. Shoupp, "Doopest Terms in Ions of the Isoelectronic Sequences Ni I to Kr IX and Pd I to Xe IX," Phys. Rev. 46, 124–129, 1934.
  2. K. R. Rao and S. G. K. Murti, "Investigations on the Spectrum of Selenium. Se I and Sev II," Proc. R. Soc. London A 145, 694–698 (1934).
  3. B. Edlén, "Atomic Energy Levels Volume II," Natl. Bur. Stand. (U.S.) Circ. 467, 158 (1952).
  4. Y. N. Joshi, Th. A. M. vanKleef, and H. Benschop, "Eighth Spectrum of Selenium: Se viii," Can. J. Phys. 54, 1545–1552 (1976).
  5. U. Feldman, M. Swartz, and L. I. Cohen, "Vacuum Ultraviolet Source," Rev. Sci. Instrum. 38, 1372–1373 (1967).
  6. A. G. Shenstone, "The Third Spectrum of Nickel (Ni III)," J. Opt. Soc. Am. 44, 749–759 (1954).
  7. R. Poppe, R. Hoekstra, and P. F. A. Klinkenberg, "Comparator for Spectroscopic Measurements using an Interferometer and Photoelectric Scanning (COSPINSCA)," App. Sci. Res. B 11, 293–309 (1964).
  8. V. Kaufman and B. Edlén, "Reference wavelengths from Atomic Spectra in the range 15 Å to 25000 Å," J. Phys. Chem. Ref. Data 3, 825–895 (1974).
  9. R. L. Kelly, "Atomic and Ionic Emission lines below 2000 Angstroms," Superintendent of documents, U. S. Govt. Printing Office, Washington D.C., Stock No. 0851–00061 (1973).
  10. R. Poppe, "Parametric treatment of the 3dn-14p configurations in the trebly ionized atoms," Physica (Utrecht) 75, 341–350 (1974).
  11. R. D. Cowan, "Theoretical calculations of Atomic Spectra using Digital Computers," J. Opt. Soc. Am. 58, 808–818 (1968).
  12. B. Edlén, "Spectra of highly ionized atoms," Physica (Utrecht) 13, 545–554 (1947).
  13. B. Edlén, "Atomic Energy Levels Volume II," Natl. Bur. Stand. (U. S.) Circ. 467, 168, 187, 194, 204, 215 (1952).
  14. J. Hansen (private communication, 1976).

1976 (1)

Y. N. Joshi, Th. A. M. vanKleef, and H. Benschop, "Eighth Spectrum of Selenium: Se viii," Can. J. Phys. 54, 1545–1552 (1976).

1974 (2)

V. Kaufman and B. Edlén, "Reference wavelengths from Atomic Spectra in the range 15 Å to 25000 Å," J. Phys. Chem. Ref. Data 3, 825–895 (1974).

R. Poppe, "Parametric treatment of the 3dn-14p configurations in the trebly ionized atoms," Physica (Utrecht) 75, 341–350 (1974).

1968 (1)

1967 (1)

U. Feldman, M. Swartz, and L. I. Cohen, "Vacuum Ultraviolet Source," Rev. Sci. Instrum. 38, 1372–1373 (1967).

1964 (1)

R. Poppe, R. Hoekstra, and P. F. A. Klinkenberg, "Comparator for Spectroscopic Measurements using an Interferometer and Photoelectric Scanning (COSPINSCA)," App. Sci. Res. B 11, 293–309 (1964).

1954 (1)

1947 (1)

B. Edlén, "Spectra of highly ionized atoms," Physica (Utrecht) 13, 545–554 (1947).

1934 (1)

K. R. Rao and S. G. K. Murti, "Investigations on the Spectrum of Selenium. Se I and Sev II," Proc. R. Soc. London A 145, 694–698 (1934).

Benschop, H.

Y. N. Joshi, Th. A. M. vanKleef, and H. Benschop, "Eighth Spectrum of Selenium: Se viii," Can. J. Phys. 54, 1545–1552 (1976).

Cohen, L. I.

U. Feldman, M. Swartz, and L. I. Cohen, "Vacuum Ultraviolet Source," Rev. Sci. Instrum. 38, 1372–1373 (1967).

Cowan, R. D.

Edlén, B.

V. Kaufman and B. Edlén, "Reference wavelengths from Atomic Spectra in the range 15 Å to 25000 Å," J. Phys. Chem. Ref. Data 3, 825–895 (1974).

B. Edlén, "Spectra of highly ionized atoms," Physica (Utrecht) 13, 545–554 (1947).

B. Edlén, "Atomic Energy Levels Volume II," Natl. Bur. Stand. (U. S.) Circ. 467, 168, 187, 194, 204, 215 (1952).

B. Edlén, "Atomic Energy Levels Volume II," Natl. Bur. Stand. (U.S.) Circ. 467, 158 (1952).

Feldman, U.

U. Feldman, M. Swartz, and L. I. Cohen, "Vacuum Ultraviolet Source," Rev. Sci. Instrum. 38, 1372–1373 (1967).

Hansen, J.

J. Hansen (private communication, 1976).

Hoekstra, R.

R. Poppe, R. Hoekstra, and P. F. A. Klinkenberg, "Comparator for Spectroscopic Measurements using an Interferometer and Photoelectric Scanning (COSPINSCA)," App. Sci. Res. B 11, 293–309 (1964).

Joshi, Y. N.

Y. N. Joshi, Th. A. M. vanKleef, and H. Benschop, "Eighth Spectrum of Selenium: Se viii," Can. J. Phys. 54, 1545–1552 (1976).

Kaufman, V.

V. Kaufman and B. Edlén, "Reference wavelengths from Atomic Spectra in the range 15 Å to 25000 Å," J. Phys. Chem. Ref. Data 3, 825–895 (1974).

Kelly, R. L.

R. L. Kelly, "Atomic and Ionic Emission lines below 2000 Angstroms," Superintendent of documents, U. S. Govt. Printing Office, Washington D.C., Stock No. 0851–00061 (1973).

Klinkenberg, P. F. A.

R. Poppe, R. Hoekstra, and P. F. A. Klinkenberg, "Comparator for Spectroscopic Measurements using an Interferometer and Photoelectric Scanning (COSPINSCA)," App. Sci. Res. B 11, 293–309 (1964).

Kruger, P. G.

P. G. Kruger and W. E. Shoupp, "Doopest Terms in Ions of the Isoelectronic Sequences Ni I to Kr IX and Pd I to Xe IX," Phys. Rev. 46, 124–129, 1934.

Murti, S. G. K.

K. R. Rao and S. G. K. Murti, "Investigations on the Spectrum of Selenium. Se I and Sev II," Proc. R. Soc. London A 145, 694–698 (1934).

Poppe, R.

R. Poppe, "Parametric treatment of the 3dn-14p configurations in the trebly ionized atoms," Physica (Utrecht) 75, 341–350 (1974).

R. Poppe, R. Hoekstra, and P. F. A. Klinkenberg, "Comparator for Spectroscopic Measurements using an Interferometer and Photoelectric Scanning (COSPINSCA)," App. Sci. Res. B 11, 293–309 (1964).

Rao, K. R.

K. R. Rao and S. G. K. Murti, "Investigations on the Spectrum of Selenium. Se I and Sev II," Proc. R. Soc. London A 145, 694–698 (1934).

Shenstone, A. G.

Shoupp, W. E.

P. G. Kruger and W. E. Shoupp, "Doopest Terms in Ions of the Isoelectronic Sequences Ni I to Kr IX and Pd I to Xe IX," Phys. Rev. 46, 124–129, 1934.

Swartz, M.

U. Feldman, M. Swartz, and L. I. Cohen, "Vacuum Ultraviolet Source," Rev. Sci. Instrum. 38, 1372–1373 (1967).

vanKleef, Th. A. M.

Y. N. Joshi, Th. A. M. vanKleef, and H. Benschop, "Eighth Spectrum of Selenium: Se viii," Can. J. Phys. 54, 1545–1552 (1976).

App. Sci. Res. B (1)

R. Poppe, R. Hoekstra, and P. F. A. Klinkenberg, "Comparator for Spectroscopic Measurements using an Interferometer and Photoelectric Scanning (COSPINSCA)," App. Sci. Res. B 11, 293–309 (1964).

Can. J. Phys. (1)

Y. N. Joshi, Th. A. M. vanKleef, and H. Benschop, "Eighth Spectrum of Selenium: Se viii," Can. J. Phys. 54, 1545–1552 (1976).

J. Opt. Soc. Am. (2)

J. Phys. Chem. Ref. Data (1)

V. Kaufman and B. Edlén, "Reference wavelengths from Atomic Spectra in the range 15 Å to 25000 Å," J. Phys. Chem. Ref. Data 3, 825–895 (1974).

Phys. Rev. (1)

P. G. Kruger and W. E. Shoupp, "Doopest Terms in Ions of the Isoelectronic Sequences Ni I to Kr IX and Pd I to Xe IX," Phys. Rev. 46, 124–129, 1934.

Physica Utrecht (2)

R. Poppe, "Parametric treatment of the 3dn-14p configurations in the trebly ionized atoms," Physica (Utrecht) 75, 341–350 (1974).

B. Edlén, "Spectra of highly ionized atoms," Physica (Utrecht) 13, 545–554 (1947).

Proc. R. Soc. London A (1)

K. R. Rao and S. G. K. Murti, "Investigations on the Spectrum of Selenium. Se I and Sev II," Proc. R. Soc. London A 145, 694–698 (1934).

Rev. Sci. Instrum. (1)

U. Feldman, M. Swartz, and L. I. Cohen, "Vacuum Ultraviolet Source," Rev. Sci. Instrum. 38, 1372–1373 (1967).

Other (4)

B. Edlén, "Atomic Energy Levels Volume II," Natl. Bur. Stand. (U.S.) Circ. 467, 158 (1952).

B. Edlén, "Atomic Energy Levels Volume II," Natl. Bur. Stand. (U. S.) Circ. 467, 168, 187, 194, 204, 215 (1952).

J. Hansen (private communication, 1976).

R. L. Kelly, "Atomic and Ionic Emission lines below 2000 Angstroms," Superintendent of documents, U. S. Govt. Printing Office, Washington D.C., Stock No. 0851–00061 (1973).

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