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Optics Letters

Optics Letters


  • Vol. 2, Iss. 3 — Mar. 1, 1978
  • pp: 72–74

New continua for absorption spectroscopy from 40 to 2000 Å

P. K. Carroll, E. T. Kennedy, and G. O'Sullivan  »View Author Affiliations

Optics Letters, Vol. 2, Issue 3, pp. 72-74 (1978)

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The spectra of plasmas produced by focusing the output of a Q-switched ruby laser (output 1 J) on the rare-earth metals have been studied. From samarium (Z = 62) to ytterbium (Z = 70), strong quasi-uniform continua are emitted in the wavelength range 40–2000 Å. Line emission from the target elements is absent over most of this wavelength region, particularly below about 600 Å. The use of these continua as simple, reliable background sources for absorption spectroscopy in the vacuum-ultraviolet and soft x-ray region down to 40 Å is demonstrated.

© 1978 Optical Society of America

Original Manuscript: November 7, 1977
Published: March 1, 1978

P. K. Carroll, E. T. Kennedy, and G. O'Sullivan, "New continua for absorption spectroscopy from 40 to 2000 Å," Opt. Lett. 2, 72-74 (1978)

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  1. A. Carillon, P. Jaegle, P. Dhez, “Extreme ultraviolet continuum absorption by a laser-generated aluminum plasma,” Phys. Rev. Lett. 25, 140 (1970);A. Carillon, G. Jamelot, A. Sureau, P. Jaegle, “Autoionizing series in the Al3+ ion spectrum of a laser-produced plasma,” Phys. Lett. 38A, 91 (1972);F. P. J. Valero, “Intensity anomalies in the extreme VUV spectrum of Al3+ obtained in a laser produced plasma,” Appl. Phys. Lett. 25, 64 (1974). [CrossRef]
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  3. C. Breton, R. Papoular, “Vacuum UV radiation of laser-produced plasmas,” J. Opt. Soc. Am. 63, 1225 (1973). [CrossRef]
  4. P. K. Carroll, E. T. Kennedy, “Doubly excited autoionization resonances in the absorption spectrum of Li+ formed in a laser-produced plasma,” Phys. Rev. Lett. 38, 1068 (1977). [CrossRef]
  5. K. Codling, R. P. Madden, “Newly observed structure in the photoionization continua of Kr and Xe below 160 Å,” Appl. Opt. 4, 1434 (1965). [CrossRef]
  6. M. Nakamura, M. Sasanuma, S. Sato, M. Watanabe, H. Tamashita, Y. Iguchi, A. Egiri, S. Nakai, S. Yamaguchi, T. Sagawa, Y. Nakai, T. Oshio, “Absorption structure near the LII,III edge of argon gas,” Phys. Rev. Lett. 21, 1303 (1968). [CrossRef]
  7. P. K. Carroll, K. Yoshino, “The cn1∏u-c′n1∑u+ Rydberg states of N2; high resolution studies,” J. Phys. B 5, 1614 (1972). [CrossRef]
  8. W. A. Rense, T. Violett, “Method of Increasing the speed of a grazing-incidence spectrograph,” J. Opt. Soc. Am. 49, 139 (1959). [CrossRef]

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